diff --git a/src/client/app/auth/views/form.vue b/src/client/app/auth/views/form.vue
index b323907eb..152b90042 100644
--- a/src/client/app/auth/views/form.vue
+++ b/src/client/app/auth/views/form.vue
@@ -94,13 +94,13 @@ export default Vue.extend({
 			margin 0 auto -38px auto
 			border solid 5px #fff
 			border-radius 100%
-			box-shadow 0 2px 2px rgba(0, 0, 0, 0.1)
+			box-shadow 0 2px 2px rgba(#000, 0.1)
 
 	> .app
 		padding 44px 16px 0 16px
 		color #555
 		background #eee
-		box-shadow 0 2px 2px rgba(0, 0, 0, 0.1) inset
+		box-shadow 0 2px 2px rgba(#000, 0.1) inset
 
 		&:after
 			content ''
diff --git a/src/client/app/auth/views/index.vue b/src/client/app/auth/views/index.vue
index e1e1b265e..0fcd9bfe5 100644
--- a/src/client/app/auth/views/index.vue
+++ b/src/client/app/auth/views/index.vue
@@ -94,7 +94,7 @@ export default Vue.extend({
 		margin 0 auto
 		text-align center
 		background #fff
-		box-shadow 0px 4px 16px rgba(0, 0, 0, 0.2)
+		box-shadow 0px 4px 16px rgba(#000, 0.2)
 
 		> .fetching
 			margin 0
diff --git a/src/client/app/common/views/components/autocomplete.vue b/src/client/app/common/views/components/autocomplete.vue
index 5c8f61a2a..84173d20b 100644
--- a/src/client/app/common/views/components/autocomplete.vue
+++ b/src/client/app/common/views/components/autocomplete.vue
@@ -234,7 +234,7 @@ export default Vue.extend({
 	margin-top calc(1em + 8px)
 	overflow hidden
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.1)
+	border solid 1px rgba(#000, 0.1)
 	border-radius 4px
 	transition top 0.1s ease, left 0.1s ease
 
@@ -253,7 +253,7 @@ export default Vue.extend({
 			white-space nowrap
 			overflow hidden
 			font-size 0.9em
-			color rgba(0, 0, 0, 0.8)
+			color rgba(#000, 0.8)
 			cursor default
 
 			&, *
@@ -285,10 +285,10 @@ export default Vue.extend({
 
 		.name
 			margin 0 8px 0 0
-			color rgba(0, 0, 0, 0.8)
+			color rgba(#000, 0.8)
 
 		.username
-			color rgba(0, 0, 0, 0.3)
+			color rgba(#000, 0.3)
 
 	> .emojis > li
 
@@ -298,10 +298,10 @@ export default Vue.extend({
 			width 24px
 
 		.name
-			color rgba(0, 0, 0, 0.8)
+			color rgba(#000, 0.8)
 
 		.alias
 			margin 0 0 0 8px
-			color rgba(0, 0, 0, 0.3)
+			color rgba(#000, 0.3)
 
 </style>
diff --git a/src/client/app/common/views/components/messaging-room.message.vue b/src/client/app/common/views/components/messaging-room.message.vue
index afd700e77..70df899f5 100644
--- a/src/client/app/common/views/components/messaging-room.message.vue
+++ b/src/client/app/common/views/components/messaging-room.message.vue
@@ -134,7 +134,7 @@ export default Vue.extend({
 				bottom -4px
 				left -12px
 				margin 0
-				color rgba(0, 0, 0, 0.5)
+				color rgba(#000, 0.5)
 				font-size 11px
 
 			> .content
@@ -146,7 +146,7 @@ export default Vue.extend({
 					overflow hidden
 					overflow-wrap break-word
 					font-size 1em
-					color rgba(0, 0, 0, 0.5)
+					color rgba(#000, 0.5)
 
 				> .text
 					display block
@@ -155,7 +155,7 @@ export default Vue.extend({
 					overflow hidden
 					overflow-wrap break-word
 					font-size 1em
-					color rgba(0, 0, 0, 0.8)
+					color rgba(#000, 0.8)
 
 					& + .file
 						> a
@@ -195,7 +195,7 @@ export default Vue.extend({
 			display block
 			margin 2px 0 0 0
 			font-size 10px
-			color rgba(0, 0, 0, 0.4)
+			color rgba(#000, 0.4)
 
 			> [data-fa]
 				margin-left 4px
diff --git a/src/client/app/common/views/components/messaging-room.vue b/src/client/app/common/views/components/messaging-room.vue
index 38202d758..a45114e6b 100644
--- a/src/client/app/common/views/components/messaging-room.vue
+++ b/src/client/app/common/views/components/messaging-room.vue
@@ -256,7 +256,7 @@ export default Vue.extend({
 			padding 16px 8px 8px 8px
 			text-align center
 			font-size 0.8em
-			color rgba(0, 0, 0, 0.4)
+			color rgba(#000, 0.4)
 
 			[data-fa]
 				margin-right 4px
@@ -267,7 +267,7 @@ export default Vue.extend({
 			padding 16px 8px 8px 8px
 			text-align center
 			font-size 0.8em
-			color rgba(0, 0, 0, 0.4)
+			color rgba(#000, 0.4)
 
 			[data-fa]
 				margin-right 4px
@@ -278,7 +278,7 @@ export default Vue.extend({
 			padding 16px
 			text-align center
 			font-size 0.8em
-			color rgba(0, 0, 0, 0.4)
+			color rgba(#000, 0.4)
 
 			[data-fa]
 				margin-right 4px
@@ -289,14 +289,14 @@ export default Vue.extend({
 			padding 0 12px
 			line-height 24px
 			color #fff
-			background rgba(0, 0, 0, 0.3)
+			background rgba(#000, 0.3)
 			border-radius 12px
 
 			&:hover
-				background rgba(0, 0, 0, 0.4)
+				background rgba(#000, 0.4)
 
 			&:active
-				background rgba(0, 0, 0, 0.5)
+				background rgba(#000, 0.5)
 
 			&.fetching
 				cursor wait
@@ -322,7 +322,7 @@ export default Vue.extend({
 				left 0
 				right 0
 				margin 0 auto
-				background rgba(0, 0, 0, 0.1)
+				background rgba(#000, 0.1)
 
 			> span
 				display inline-block
@@ -330,7 +330,7 @@ export default Vue.extend({
 				padding 0 16px
 				//font-weight bold
 				line-height 32px
-				color rgba(0, 0, 0, 0.3)
+				color rgba(#000, 0.3)
 				background #fff
 
 	> footer
diff --git a/src/client/app/common/views/components/messaging.vue b/src/client/app/common/views/components/messaging.vue
index 6f799b34b..6f8fcb3a7 100644
--- a/src/client/app/common/views/components/messaging.vue
+++ b/src/client/app/common/views/components/messaging.vue
@@ -205,7 +205,7 @@ root(isDark)
 		z-index 1
 		width 100%
 		background #fff
-		box-shadow 0 0px 2px rgba(0, 0, 0, 0.2)
+		box-shadow 0 0px 2px rgba(#000, 0.2)
 
 		> .form
 			padding 8px
@@ -279,7 +279,7 @@ root(isDark)
 					vertical-align top
 					white-space nowrap
 					overflow hidden
-					color rgba(0, 0, 0, 0.8)
+					color rgba(#000, 0.8)
 					text-decoration none
 					transition none
 					cursor pointer
@@ -318,11 +318,11 @@ root(isDark)
 						margin 0 8px 0 0
 						/*font-weight bold*/
 						font-weight normal
-						color rgba(0, 0, 0, 0.8)
+						color rgba(#000, 0.8)
 
 					.username
 						font-weight normal
-						color rgba(0, 0, 0, 0.3)
+						color rgba(#000, 0.3)
 
 	> .history
 
@@ -383,17 +383,17 @@ root(isDark)
 						overflow hidden
 						text-overflow ellipsis
 						font-size 1em
-						color isDark ? #fff : rgba(0, 0, 0, 0.9)
+						color isDark ? #fff : rgba(#000, 0.9)
 						font-weight bold
 						transition all 0.1s ease
 
 					> .username
 						margin 0 8px
-						color isDark ? #606984 : rgba(0, 0, 0, 0.5)
+						color isDark ? #606984 : rgba(#000, 0.5)
 
 					> .mk-time
 						margin 0 0 0 auto
-						color isDark ? #606984 : rgba(0, 0, 0, 0.5)
+						color isDark ? #606984 : rgba(#000, 0.5)
 						font-size 80%
 
 				> .avatar
@@ -413,10 +413,10 @@ root(isDark)
 						overflow hidden
 						overflow-wrap break-word
 						font-size 1.1em
-						color isDark ? #fff : rgba(0, 0, 0, 0.8)
+						color isDark ? #fff : rgba(#000, 0.8)
 
 						.me
-							color isDark ? rgba(#fff, 0.7) : rgba(0, 0, 0, 0.4)
+							color isDark ? rgba(#fff, 0.7) : rgba(#000, 0.4)
 
 					> .image
 						display block
diff --git a/src/client/app/common/views/components/note-menu.vue b/src/client/app/common/views/components/note-menu.vue
index 3e4be425d..88dc22aaf 100644
--- a/src/client/app/common/views/components/note-menu.vue
+++ b/src/client/app/common/views/components/note-menu.vue
@@ -105,7 +105,7 @@ $border-color = rgba(27, 31, 35, 0.15)
 		z-index 10000
 		width 100%
 		height 100%
-		background rgba(0, 0, 0, 0.1)
+		background rgba(#000, 0.1)
 		opacity 0
 
 	> .popover
diff --git a/src/client/app/common/views/components/poll.vue b/src/client/app/common/views/components/poll.vue
index de4373f56..46e41cbcd 100644
--- a/src/client/app/common/views/components/poll.vue
+++ b/src/client/app/common/views/components/poll.vue
@@ -88,10 +88,10 @@ root(isDark)
 			cursor pointer
 
 			&:hover
-				background rgba(0, 0, 0, 0.05)
+				background rgba(#000, 0.05)
 
 			&:active
-				background rgba(0, 0, 0, 0.1)
+				background rgba(#000, 0.1)
 
 			> .backdrop
 				position absolute
diff --git a/src/client/app/common/views/components/signin.vue b/src/client/app/common/views/components/signin.vue
index 25f90a2f1..7fb9fc3fd 100644
--- a/src/client/app/common/views/components/signin.vue
+++ b/src/client/app/common/views/components/signin.vue
@@ -91,7 +91,7 @@ export default Vue.extend({
 			width 100%
 			line-height 44px
 			font-size 1em
-			color rgba(0, 0, 0, 0.7)
+			color rgba(#000, 0.7)
 			background #fff
 			outline none
 			border solid 1px #eee
@@ -117,7 +117,7 @@ export default Vue.extend({
 		margin -6px 0 0 0
 		width 100%
 		font-size 1.2em
-		color rgba(0, 0, 0, 0.5)
+		color rgba(#000, 0.5)
 		outline none
 		border none
 		border-radius 0
diff --git a/src/client/app/common/views/components/signup.vue b/src/client/app/common/views/components/signup.vue
index 33a559ff8..516979acd 100644
--- a/src/client/app/common/views/components/signup.vue
+++ b/src/client/app/common/views/components/signup.vue
@@ -234,13 +234,13 @@ export default Vue.extend({
 		color #333 !important
 		background #fff !important
 		outline none
-		border solid 1px rgba(0, 0, 0, 0.1)
+		border solid 1px rgba(#000, 0.1)
 		border-radius 4px
 		box-shadow 0 0 0 114514px #fff inset
 		transition all .3s ease
 
 		&:hover
-			border-color rgba(0, 0, 0, 0.2)
+			border-color rgba(#000, 0.2)
 			transition all .1s ease
 
 		&:focus
diff --git a/src/client/app/common/views/components/stream-indicator.vue b/src/client/app/common/views/components/stream-indicator.vue
index 93758102d..d573db32e 100644
--- a/src/client/app/common/views/components/stream-indicator.vue
+++ b/src/client/app/common/views/components/stream-indicator.vue
@@ -73,7 +73,7 @@ export default Vue.extend({
 	padding 6px 12px
 	font-size 0.9em
 	color #fff
-	background rgba(0, 0, 0, 0.8)
+	background rgba(#000, 0.8)
 	border-radius 4px
 
 	> p
diff --git a/src/client/app/common/views/components/visibility-chooser.vue b/src/client/app/common/views/components/visibility-chooser.vue
index dd36d32e7..50f0877ae 100644
--- a/src/client/app/common/views/components/visibility-chooser.vue
+++ b/src/client/app/common/views/components/visibility-chooser.vue
@@ -53,18 +53,28 @@ export default Vue.extend({
 			const width = popover.offsetWidth;
 			const height = popover.offsetHeight;
 
+			let left;
+			let top;
+
 			if (this.compact) {
 				const x = rect.left + window.pageXOffset + (this.source.offsetWidth / 2);
 				const y = rect.top + window.pageYOffset + (this.source.offsetHeight / 2);
-				popover.style.left = (x - (width / 2)) + 'px';
-				popover.style.top = (y - (height / 2)) + 'px';
+				left = (x - (width / 2));
+				top = (y - (height / 2));
 			} else {
 				const x = rect.left + window.pageXOffset + (this.source.offsetWidth / 2);
 				const y = rect.top + window.pageYOffset + this.source.offsetHeight;
-				popover.style.left = (x - (width / 2)) + 'px';
-				popover.style.top = y + 'px';
+				left = (x - (width / 2));
+				top = y;
 			}
 
+			if (left + width > window.innerWidth) {
+				left = window.innerWidth - width;
+			}
+
+			popover.style.left = left + 'px';
+			popover.style.top = top + 'px';
+
 			anime({
 				targets: this.$refs.backdrop,
 				opacity: 1,
diff --git a/src/client/app/common/views/components/welcome-timeline.vue b/src/client/app/common/views/components/welcome-timeline.vue
index a80bc04f7..349797690 100644
--- a/src/client/app/common/views/components/welcome-timeline.vue
+++ b/src/client/app/common/views/components/welcome-timeline.vue
@@ -62,7 +62,7 @@ export default Vue.extend({
 		overflow-wrap break-word
 		font-size .9em
 		color #4C4C4C
-		border-bottom 1px solid rgba(0, 0, 0, 0.05)
+		border-bottom 1px solid rgba(#000, 0.05)
 
 		&:after
 			content ""
diff --git a/src/client/app/common/views/widgets/access-log.vue b/src/client/app/common/views/widgets/access-log.vue
index 637ba328c..0b1c7fe2d 100644
--- a/src/client/app/common/views/widgets/access-log.vue
+++ b/src/client/app/common/views/widgets/access-log.vue
@@ -78,7 +78,7 @@ export default define({
 		color #555
 
 		&:nth-child(odd)
-			background rgba(0, 0, 0, 0.025)
+			background rgba(#000, 0.025)
 
 		> b
 			margin-right 4px
diff --git a/src/client/app/common/views/widgets/calendar.vue b/src/client/app/common/views/widgets/calendar.vue
index b3b5b3583..0bb503759 100644
--- a/src/client/app/common/views/widgets/calendar.vue
+++ b/src/client/app/common/views/widgets/calendar.vue
@@ -113,7 +113,7 @@ root(isDark)
 	padding 16px 0
 	color isDark ? #c5ced6 :#777
 	background isDark ? #282C37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	&[data-special='on-new-years-day']
@@ -126,7 +126,7 @@ root(isDark)
 	&[data-mobile]
 		border none
 		border-radius 8px
-		box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+		box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 	&:after
 		content ""
diff --git a/src/client/app/common/views/widgets/donation.vue b/src/client/app/common/views/widgets/donation.vue
index 1063c2c27..e35462611 100644
--- a/src/client/app/common/views/widgets/donation.vue
+++ b/src/client/app/common/views/widgets/donation.vue
@@ -46,7 +46,7 @@ root(isDark)
 		border none
 		background #ead8bb
 		border-radius 8px
-		box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+		box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 		> article
 			> h1
diff --git a/src/client/app/common/views/widgets/rss.vue b/src/client/app/common/views/widgets/rss.vue
index 1a6336252..f0ba11678 100644
--- a/src/client/app/common/views/widgets/rss.vue
+++ b/src/client/app/common/views/widgets/rss.vue
@@ -92,7 +92,7 @@ root(isDark)
 					padding 8px 16px
 
 					&:nth-child(even)
-						background rgba(0, 0, 0, 0.05)
+						background rgba(#000, 0.05)
 
 .mkw-rss[data-darkmode]
 	root(true)
diff --git a/src/client/app/common/views/widgets/server.pie.vue b/src/client/app/common/views/widgets/server.pie.vue
index 16859fe07..532041ae7 100644
--- a/src/client/app/common/views/widgets/server.pie.vue
+++ b/src/client/app/common/views/widgets/server.pie.vue
@@ -5,7 +5,7 @@
 		cx="50%" cy="50%"
 		fill="none"
 		stroke-width="0.1"
-		stroke="rgba(0, 0, 0, 0.05)"/>
+		stroke="rgba(#000, 0.05)"/>
 	<circle
 		:r="r"
 		cx="50%" cy="50%"
@@ -56,7 +56,7 @@ root(isDark)
 
 	> text
 		font-size 0.15px
-		fill isDark ? rgba(#fff, 0.6) : rgba(0, 0, 0, 0.6)
+		fill isDark ? rgba(#fff, 0.6) : rgba(#000, 0.6)
 
 svg[data-darkmode]
 	root(true)
diff --git a/src/client/app/common/views/widgets/slideshow.vue b/src/client/app/common/views/widgets/slideshow.vue
index ad32299f3..95be4b94f 100644
--- a/src/client/app/common/views/widgets/slideshow.vue
+++ b/src/client/app/common/views/widgets/slideshow.vue
@@ -122,13 +122,13 @@ export default define({
 .mkw-slideshow
 	overflow hidden
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	&[data-mobile]
 		border none
 		border-radius 8px
-		box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+		box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 	> div
 		width 100%
diff --git a/src/client/app/desktop/views/components/activity.calendar.vue b/src/client/app/desktop/views/components/activity.calendar.vue
index 8b43536c2..e48857107 100644
--- a/src/client/app/desktop/views/components/activity.calendar.vue
+++ b/src/client/app/desktop/views/components/activity.calendar.vue
@@ -61,6 +61,6 @@ svg
 
 		&.day
 			&:hover
-				fill rgba(0, 0, 0, 0.05)
+				fill rgba(#000, 0.05)
 
 </style>
diff --git a/src/client/app/desktop/views/components/calendar.vue b/src/client/app/desktop/views/components/calendar.vue
index 483a4c718..1d8cc4f3a 100644
--- a/src/client/app/desktop/views/components/calendar.vue
+++ b/src/client/app/desktop/views/components/calendar.vue
@@ -136,7 +136,7 @@ export default Vue.extend({
 root(isDark)
 	color isDark ? #c5ced6 : #777
 	background isDark ? #282C37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	&[data-melt]
@@ -152,7 +152,7 @@ root(isDark)
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> [data-fa]
 			margin-right 4px
@@ -214,10 +214,10 @@ root(isDark)
 					border-radius 6px
 
 				&:hover > div
-					background rgba(0, 0, 0, 0.025)
+					background rgba(#000, 0.025)
 
 				&:active > div
-					background rgba(0, 0, 0, 0.05)
+					background rgba(#000, 0.05)
 
 				&[data-is-donichi]
 					color #ef95a0
@@ -233,10 +233,10 @@ root(isDark)
 					font-weight bold
 
 					> div
-						background rgba(0, 0, 0, 0.025)
+						background rgba(#000, 0.025)
 
 					&:active > div
-						background rgba(0, 0, 0, 0.05)
+						background rgba(#000, 0.05)
 
 				&[data-today]
 					> div
diff --git a/src/client/app/desktop/views/components/context-menu.menu.vue b/src/client/app/desktop/views/components/context-menu.menu.vue
index 3d884e0b8..843604a05 100644
--- a/src/client/app/desktop/views/components/context-menu.menu.vue
+++ b/src/client/app/desktop/views/components/context-menu.menu.vue
@@ -106,7 +106,7 @@ root(isDark)
 		width $width
 		background isDark ? #282c37 :#fff
 		border-radius 0 4px 4px 4px
-		box-shadow 2px 2px 8px rgba(0, 0, 0, 0.2)
+		box-shadow 2px 2px 8px rgba(#000, 0.2)
 		transition visibility 0s linear 0.2s
 
 .menu[data-darkmode]
diff --git a/src/client/app/desktop/views/components/context-menu.vue b/src/client/app/desktop/views/components/context-menu.vue
index d7548c441..60a33f9c9 100644
--- a/src/client/app/desktop/views/components/context-menu.vue
+++ b/src/client/app/desktop/views/components/context-menu.vue
@@ -68,7 +68,7 @@ root(isDark)
 	font-size 0.8em
 	background isDark ? #282c37 : #fff
 	border-radius 0 4px 4px 4px
-	box-shadow 2px 2px 8px rgba(0, 0, 0, 0.2)
+	box-shadow 2px 2px 8px rgba(#000, 0.2)
 	opacity 0
 
 .context-menu[data-darkmode]
diff --git a/src/client/app/desktop/views/components/dialog.vue b/src/client/app/desktop/views/components/dialog.vue
index fa17e4a9d..aff21c175 100644
--- a/src/client/app/desktop/views/components/dialog.vue
+++ b/src/client/app/desktop/views/components/dialog.vue
@@ -102,7 +102,7 @@ export default Vue.extend({
 		left 0
 		width 100%
 		height 100%
-		background rgba(0, 0, 0, 0.7)
+		background rgba(#000, 0.7)
 		opacity 0
 		pointer-events none
 
diff --git a/src/client/app/desktop/views/components/drive.file.vue b/src/client/app/desktop/views/components/drive.file.vue
index a683af68a..39881711f 100644
--- a/src/client/app/desktop/views/components/drive.file.vue
+++ b/src/client/app/desktop/views/components/drive.file.vue
@@ -195,7 +195,7 @@ root(isDark)
 		cursor pointer
 
 	&:hover
-		background rgba(0, 0, 0, 0.05)
+		background rgba(#000, 0.05)
 
 		> .label
 			&:before
@@ -203,7 +203,7 @@ root(isDark)
 				background #0b65a5
 
 	&:active
-		background rgba(0, 0, 0, 0.1)
+		background rgba(#000, 0.1)
 
 		> .label
 			&:before
diff --git a/src/client/app/desktop/views/components/drive.vue b/src/client/app/desktop/views/components/drive.vue
index aebface11..973df1014 100644
--- a/src/client/app/desktop/views/components/drive.vue
+++ b/src/client/app/desktop/views/components/drive.vue
@@ -587,7 +587,7 @@ root(isDark)
 		font-size 0.9em
 		color isDark ? #d2d9dc : #555
 		background isDark ? #282c37 : #fff
-		box-shadow 0 1px 0 rgba(0, 0, 0, 0.05)
+		box-shadow 0 1px 0 rgba(#000, 0.05)
 
 		&, *
 			user-select none
@@ -733,7 +733,7 @@ root(isDark)
 				display inline-block
 				position absolute
 				top 0
-				background-color rgba(0, 0, 0, 0.3)
+				background-color rgba(#000, 0.3)
 				border-radius 100%
 
 				animation sk-bounce 2.0s infinite ease-in-out
diff --git a/src/client/app/desktop/views/components/ellipsis-icon.vue b/src/client/app/desktop/views/components/ellipsis-icon.vue
index c54a7db29..4a5a0f23d 100644
--- a/src/client/app/desktop/views/components/ellipsis-icon.vue
+++ b/src/client/app/desktop/views/components/ellipsis-icon.vue
@@ -14,7 +14,7 @@
 		display inline-block
 		width 18px
 		height 18px
-		background-color rgba(0, 0, 0, 0.3)
+		background-color rgba(#000, 0.3)
 		border-radius 100%
 		animation bounce 1.4s infinite ease-in-out both
 
diff --git a/src/client/app/desktop/views/components/home.vue b/src/client/app/desktop/views/components/home.vue
index 5c5b46217..4343a7fb7 100644
--- a/src/client/app/desktop/views/components/home.vue
+++ b/src/client/app/desktop/views/components/home.vue
@@ -251,7 +251,7 @@ root(isDark)
 		height 48px
 		color isDark ? #fff : #000
 		background isDark ? #313543 : #f7f7f7
-		box-shadow 0 1px 1px rgba(0, 0, 0, 0.075)
+		box-shadow 0 1px 1px rgba(#000, 0.075)
 
 		> a
 			display block
diff --git a/src/client/app/desktop/views/components/media-image-dialog.vue b/src/client/app/desktop/views/components/media-image-dialog.vue
index dec140d1c..026522d90 100644
--- a/src/client/app/desktop/views/components/media-image-dialog.vue
+++ b/src/client/app/desktop/views/components/media-image-dialog.vue
@@ -52,7 +52,7 @@ export default Vue.extend({
 		left 0
 		width 100%
 		height 100%
-		background rgba(0, 0, 0, 0.7)
+		background rgba(#000, 0.7)
 
 	> img
 		position fixed
diff --git a/src/client/app/desktop/views/components/media-video-dialog.vue b/src/client/app/desktop/views/components/media-video-dialog.vue
index cbf862cd1..959cefa42 100644
--- a/src/client/app/desktop/views/components/media-video-dialog.vue
+++ b/src/client/app/desktop/views/components/media-video-dialog.vue
@@ -54,7 +54,7 @@ export default Vue.extend({
 		left 0
 		width 100%
 		height 100%
-		background rgba(0, 0, 0, 0.7)
+		background rgba(#000, 0.7)
 
 	> video
 		position fixed
diff --git a/src/client/app/desktop/views/components/mentions.vue b/src/client/app/desktop/views/components/mentions.vue
index 53d08a0ec..66bdab5c0 100644
--- a/src/client/app/desktop/views/components/mentions.vue
+++ b/src/client/app/desktop/views/components/mentions.vue
@@ -85,7 +85,7 @@ export default Vue.extend({
 
 .mk-mentions
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> header
diff --git a/src/client/app/desktop/views/components/note-detail.sub.vue b/src/client/app/desktop/views/components/note-detail.sub.vue
index fb3342130..5175c8bd4 100644
--- a/src/client/app/desktop/views/components/note-detail.sub.vue
+++ b/src/client/app/desktop/views/components/note-detail.sub.vue
@@ -17,6 +17,7 @@
 		</header>
 		<div class="body">
 			<div class="text">
+				<span v-if="note.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 				<mk-note-html v-if="note.text" :text="note.text" :i="os.i"/>
 			</div>
 			<div class="media" v-if="note.mediaIds.length > 0">
diff --git a/src/client/app/desktop/views/components/note-detail.vue b/src/client/app/desktop/views/components/note-detail.vue
index eb12ea109..525023349 100644
--- a/src/client/app/desktop/views/components/note-detail.vue
+++ b/src/client/app/desktop/views/components/note-detail.vue
@@ -39,6 +39,7 @@
 		</header>
 		<div class="body">
 			<div class="text">
+				<span v-if="p.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 				<mk-note-html v-if="p.text" :text="p.text" :i="os.i"/>
 			</div>
 			<div class="media" v-if="p.media.length > 0">
@@ -222,7 +223,7 @@ root(isDark)
 	overflow hidden
 	text-align left
 	background isDark ? #282C37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.1)
+	border solid 1px rgba(#000, 0.1)
 	border-radius 8px
 
 	> .read-more
diff --git a/src/client/app/desktop/views/components/notes.note.vue b/src/client/app/desktop/views/components/notes.note.vue
index e8fabe3c6..4d7e6ee8b 100644
--- a/src/client/app/desktop/views/components/notes.note.vue
+++ b/src/client/app/desktop/views/components/notes.note.vue
@@ -607,7 +607,7 @@ root(isDark)
 
 	> .detail
 		padding-top 4px
-		background rgba(0, 0, 0, 0.0125)
+		background rgba(#000, 0.0125)
 
 .note[data-darkmode]
 	root(true)
diff --git a/src/client/app/desktop/views/components/notifications.vue b/src/client/app/desktop/views/components/notifications.vue
index 47463b8b5..36e9dce6a 100644
--- a/src/client/app/desktop/views/components/notifications.vue
+++ b/src/client/app/desktop/views/components/notifications.vue
@@ -204,7 +204,7 @@ root(isDark)
 				padding 16px
 				overflow-wrap break-word
 				font-size 0.9em
-				border-bottom solid 1px isDark ? #1c2023 : rgba(0, 0, 0, 0.05)
+				border-bottom solid 1px isDark ? #1c2023 : rgba(#000, 0.05)
 
 				&:last-child
 					border-bottom none
@@ -215,7 +215,7 @@ root(isDark)
 					top 16px
 					right 12px
 					vertical-align top
-					color isDark ? #606984 : rgba(0, 0, 0, 0.6)
+					color isDark ? #606984 : rgba(#000, 0.6)
 					font-size small
 
 				&:after
@@ -250,10 +250,10 @@ root(isDark)
 							margin-right 4px
 
 				.note-preview
-					color isDark ? #c2cad4 : rgba(0, 0, 0, 0.7)
+					color isDark ? #c2cad4 : rgba(#000, 0.7)
 
 				.note-ref
-					color isDark ? #c2cad4 : rgba(0, 0, 0, 0.7)
+					color isDark ? #c2cad4 : rgba(#000, 0.7)
 
 					[data-fa]
 						font-size 1em
@@ -282,7 +282,7 @@ root(isDark)
 				font-size 0.8em
 				color isDark ? #666b79 : #aaa
 				background isDark ? #242731 : #fdfdfd
-				border-bottom solid 1px isDark ? #1c2023 : rgba(0, 0, 0, 0.05)
+				border-bottom solid 1px isDark ? #1c2023 : rgba(#000, 0.05)
 
 				span
 					margin 0 16px
@@ -295,13 +295,13 @@ root(isDark)
 		width 100%
 		padding 16px
 		color #555
-		border-top solid 1px rgba(0, 0, 0, 0.05)
+		border-top solid 1px rgba(#000, 0.05)
 
 		&:hover
-			background rgba(0, 0, 0, 0.025)
+			background rgba(#000, 0.025)
 
 		&:active
-			background rgba(0, 0, 0, 0.05)
+			background rgba(#000, 0.05)
 
 		&.fetching
 			cursor wait
diff --git a/src/client/app/desktop/views/components/post-form.vue b/src/client/app/desktop/views/components/post-form.vue
index d704cdc3c..92a7f9ada 100644
--- a/src/client/app/desktop/views/components/post-form.vue
+++ b/src/client/app/desktop/views/components/post-form.vue
@@ -364,7 +364,6 @@ root(isDark)
 		clear both
 
 	> .content
-
 		> input
 		> textarea
 			display block
@@ -585,7 +584,7 @@ root(isDark)
 			color rgba($theme-color, 0.6)
 			background isDark ? transparent : linear-gradient(to bottom, lighten($theme-color, 80%) 0%, lighten($theme-color, 90%) 100%)
 			border-color rgba($theme-color, 0.5)
-			box-shadow 0 2px 4px rgba(0, 0, 0, 0.15) inset
+			box-shadow 0 2px 4px rgba(#000, 0.15) inset
 
 		&:focus
 			&:after
diff --git a/src/client/app/desktop/views/components/timeline.vue b/src/client/app/desktop/views/components/timeline.vue
index 2047b5dce..bcfce299f 100644
--- a/src/client/app/desktop/views/components/timeline.vue
+++ b/src/client/app/desktop/views/components/timeline.vue
@@ -59,7 +59,7 @@ export default Vue.extend({
 
 root(isDark)
 	background isDark ? #282C37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> header
diff --git a/src/client/app/desktop/views/components/ui.header.account.vue b/src/client/app/desktop/views/components/ui.header.account.vue
index 5148c5b96..145666b4b 100644
--- a/src/client/app/desktop/views/components/ui.header.account.vue
+++ b/src/client/app/desktop/views/components/ui.header.account.vue
@@ -165,7 +165,7 @@ root(isDark)
 		font-size 0.8em
 		background $bgcolor
 		border-radius 4px
-		box-shadow 0 1px 4px rgba(0, 0, 0, 0.25)
+		box-shadow 0 1px 4px rgba(#000, 0.25)
 
 		&:before
 			content ""
@@ -176,7 +176,7 @@ root(isDark)
 			right 12px
 			border-top solid 14px transparent
 			border-right solid 14px transparent
-			border-bottom solid 14px rgba(0, 0, 0, 0.1)
+			border-bottom solid 14px rgba(#000, 0.1)
 			border-left solid 14px transparent
 
 		&:after
diff --git a/src/client/app/desktop/views/components/ui.header.notifications.vue b/src/client/app/desktop/views/components/ui.header.notifications.vue
index 5326f9283..ea814dd7a 100644
--- a/src/client/app/desktop/views/components/ui.header.notifications.vue
+++ b/src/client/app/desktop/views/components/ui.header.notifications.vue
@@ -125,7 +125,7 @@ root(isDark)
 		width 300px
 		background $bgcolor
 		border-radius 4px
-		box-shadow 0 1px 4px rgba(0, 0, 0, 0.25)
+		box-shadow 0 1px 4px rgba(#000, 0.25)
 
 		&:before
 			content ""
@@ -136,7 +136,7 @@ root(isDark)
 			right 74px
 			border-top solid 14px transparent
 			border-right solid 14px transparent
-			border-bottom solid 14px rgba(0, 0, 0, 0.1)
+			border-bottom solid 14px rgba(#000, 0.1)
 			border-left solid 14px transparent
 
 		&:after
diff --git a/src/client/app/desktop/views/components/ui.header.search.vue b/src/client/app/desktop/views/components/ui.header.search.vue
index 3167aab8a..1ed28ba3a 100644
--- a/src/client/app/desktop/views/components/ui.header.search.vue
+++ b/src/client/app/desktop/views/components/ui.header.search.vue
@@ -50,7 +50,7 @@ export default Vue.extend({
 		width 14em
 		height 32px
 		font-size 1em
-		background rgba(0, 0, 0, 0.05)
+		background rgba(#000, 0.05)
 		outline none
 		//border solid 1px #ddd
 		border none
@@ -62,7 +62,7 @@ export default Vue.extend({
 			color #9eaba8
 
 		&:hover
-			background rgba(0, 0, 0, 0.08)
+			background rgba(#000, 0.08)
 
 		&:focus
 			box-shadow 0 0 0 2px rgba($theme-color, 0.5) !important
diff --git a/src/client/app/desktop/views/components/ui.header.vue b/src/client/app/desktop/views/components/ui.header.vue
index 7ce85d4c3..353fd5856 100644
--- a/src/client/app/desktop/views/components/ui.header.vue
+++ b/src/client/app/desktop/views/components/ui.header.vue
@@ -103,7 +103,7 @@ root(isDark)
 	top 0
 	z-index 1000
 	width 100%
-	box-shadow 0 1px 1px rgba(0, 0, 0, 0.075)
+	box-shadow 0 1px 1px rgba(#000, 0.075)
 
 	> .main
 		height 48px
diff --git a/src/client/app/desktop/views/components/user-preview.vue b/src/client/app/desktop/views/components/user-preview.vue
index 2e1870800..d0111d7dc 100644
--- a/src/client/app/desktop/views/components/user-preview.vue
+++ b/src/client/app/desktop/views/components/user-preview.vue
@@ -94,7 +94,7 @@ root(isDark)
 	width 250px
 	background isDark ? #282c37 : #fff
 	background-clip content-box
-	border solid 1px rgba(0, 0, 0, 0.1)
+	border solid 1px rgba(#000, 0.1)
 	border-radius 4px
 	overflow hidden
 	opacity 0
diff --git a/src/client/app/desktop/views/components/users-list.vue b/src/client/app/desktop/views/components/users-list.vue
index e8f4c94d4..13d0d07bb 100644
--- a/src/client/app/desktop/views/components/users-list.vue
+++ b/src/client/app/desktop/views/components/users-list.vue
@@ -119,7 +119,7 @@ export default Vue.extend({
 		overflow auto
 
 		> *
-			border-bottom solid 1px rgba(0, 0, 0, 0.05)
+			border-bottom solid 1px rgba(#000, 0.05)
 
 			> *
 				max-width 600px
diff --git a/src/client/app/desktop/views/components/widget-container.vue b/src/client/app/desktop/views/components/widget-container.vue
index 926d7702b..2edba5a23 100644
--- a/src/client/app/desktop/views/components/widget-container.vue
+++ b/src/client/app/desktop/views/components/widget-container.vue
@@ -36,7 +36,7 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 root(isDark)
 	background isDark ? #282C37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 	overflow hidden
 
@@ -55,7 +55,7 @@ root(isDark)
 			font-size 0.9em
 			font-weight bold
 			color isDark ? #e3e5e8 : #888
-			box-shadow 0 1px rgba(0, 0, 0, 0.07)
+			box-shadow 0 1px rgba(#000, 0.07)
 
 			> [data-fa]
 				margin-right 6px
diff --git a/src/client/app/desktop/views/components/window.vue b/src/client/app/desktop/views/components/window.vue
index 3de1413ac..c9820f869 100644
--- a/src/client/app/desktop/views/components/window.vue
+++ b/src/client/app/desktop/views/components/window.vue
@@ -17,14 +17,16 @@
 				<slot></slot>
 			</div>
 		</div>
-		<div class="handle top" v-if="canResize" @mousedown.prevent="onTopHandleMousedown"></div>
-		<div class="handle right" v-if="canResize" @mousedown.prevent="onRightHandleMousedown"></div>
-		<div class="handle bottom" v-if="canResize" @mousedown.prevent="onBottomHandleMousedown"></div>
-		<div class="handle left" v-if="canResize" @mousedown.prevent="onLeftHandleMousedown"></div>
-		<div class="handle top-left" v-if="canResize" @mousedown.prevent="onTopLeftHandleMousedown"></div>
-		<div class="handle top-right" v-if="canResize" @mousedown.prevent="onTopRightHandleMousedown"></div>
-		<div class="handle bottom-right" v-if="canResize" @mousedown.prevent="onBottomRightHandleMousedown"></div>
-		<div class="handle bottom-left" v-if="canResize" @mousedown.prevent="onBottomLeftHandleMousedown"></div>
+		<template v-if="canResize">
+			<div class="handle top" @mousedown.prevent="onTopHandleMousedown"></div>
+			<div class="handle right" @mousedown.prevent="onRightHandleMousedown"></div>
+			<div class="handle bottom" @mousedown.prevent="onBottomHandleMousedown"></div>
+			<div class="handle left" @mousedown.prevent="onLeftHandleMousedown"></div>
+			<div class="handle top-left" @mousedown.prevent="onTopLeftHandleMousedown"></div>
+			<div class="handle top-right" @mousedown.prevent="onTopRightHandleMousedown"></div>
+			<div class="handle bottom-right" @mousedown.prevent="onBottomRightHandleMousedown"></div>
+			<div class="handle bottom-left" @mousedown.prevent="onBottomLeftHandleMousedown"></div>
+		</template>
 	</div>
 </div>
 </template>
@@ -85,7 +87,7 @@ export default Vue.extend({
 
 	computed: {
 		isFlexible(): boolean {
-			return this.height == null;
+			return this.height == 'auto';
 		},
 		canResize(): boolean {
 			return !this.isFlexible;
@@ -476,7 +478,7 @@ root(isDark)
 		left 0
 		width 100%
 		height 100%
-		background rgba(0, 0, 0, 0.7)
+		background rgba(#000, 0.7)
 		opacity 0
 		pointer-events none
 
@@ -493,7 +495,7 @@ root(isDark)
 		&:focus
 			&:not([data-is-modal])
 				> .body
-					box-shadow 0 0 0px 1px rgba($theme-color, 0.5), 0 2px 6px 0 rgba(0, 0, 0, 0.2)
+					box-shadow 0 0 0px 1px rgba($theme-color, 0.5), 0 2px 6px 0 rgba(#000, 0.2)
 
 		> .handle
 			$size = 8px
@@ -561,7 +563,7 @@ root(isDark)
 			overflow hidden
 			background isDark ? #282C37 : #fff
 			border-radius 6px
-			box-shadow 0 2px 6px 0 rgba(0, 0, 0, 0.2)
+			box-shadow 0 2px 6px 0 rgba(#000, 0.2)
 
 			> header
 				$header-height = 40px
diff --git a/src/client/app/desktop/views/pages/search.vue b/src/client/app/desktop/views/pages/search.vue
index 698154e66..67e1e3bfe 100644
--- a/src/client/app/desktop/views/pages/search.vue
+++ b/src/client/app/desktop/views/pages/search.vue
@@ -114,7 +114,7 @@ export default Vue.extend({
 .notes
 	max-width 600px
 	margin 0 auto
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 	overflow hidden
 
diff --git a/src/client/app/desktop/views/pages/user/user.followers-you-know.vue b/src/client/app/desktop/views/pages/user/user.followers-you-know.vue
index 9ccbc7a31..4c1b91e7a 100644
--- a/src/client/app/desktop/views/pages/user/user.followers-you-know.vue
+++ b/src/client/app/desktop/views/pages/user/user.followers-you-know.vue
@@ -38,7 +38,7 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 .followers-you-know
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> .title
@@ -49,7 +49,7 @@ export default Vue.extend({
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> i
 			margin-right 4px
diff --git a/src/client/app/desktop/views/pages/user/user.friends.vue b/src/client/app/desktop/views/pages/user/user.friends.vue
index 203f93647..161b08d1d 100644
--- a/src/client/app/desktop/views/pages/user/user.friends.vue
+++ b/src/client/app/desktop/views/pages/user/user.friends.vue
@@ -44,7 +44,7 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 .friends
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> .title
@@ -55,7 +55,7 @@ export default Vue.extend({
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> i
 			margin-right 4px
diff --git a/src/client/app/desktop/views/pages/user/user.header.vue b/src/client/app/desktop/views/pages/user/user.header.vue
index 8f72fd716..99fe0b18d 100644
--- a/src/client/app/desktop/views/pages/user/user.header.vue
+++ b/src/client/app/desktop/views/pages/user/user.header.vue
@@ -72,7 +72,7 @@ export default Vue.extend({
 
 	overflow hidden
 	background #f7f7f7
-	box-shadow 0 1px 1px rgba(0, 0, 0, 0.075)
+	box-shadow 0 1px 1px rgba(#000, 0.075)
 
 	> .is-suspended
 	> .is-remote
@@ -99,7 +99,7 @@ export default Vue.extend({
 				background-color #383838
 
 			> .fade
-				background linear-gradient(transparent, rgba(0, 0, 0, 0.7))
+				background linear-gradient(transparent, rgba(#000, 0.7))
 
 		> .container
 			> .title
@@ -142,7 +142,7 @@ export default Vue.extend({
 			margin 0
 			border solid 3px #fff
 			border-radius 8px
-			box-shadow 1px 1px 3px rgba(0, 0, 0, 0.2)
+			box-shadow 1px 1px 3px rgba(#000, 0.2)
 
 		> .title
 			position absolute
diff --git a/src/client/app/desktop/views/pages/user/user.home.vue b/src/client/app/desktop/views/pages/user/user.home.vue
index 7ca520ea7..6b242a612 100644
--- a/src/client/app/desktop/views/pages/user/user.home.vue
+++ b/src/client/app/desktop/views/pages/user/user.home.vue
@@ -65,7 +65,7 @@ export default Vue.extend({
 		width calc(100% - 275px * 2)
 
 		> .timeline
-			border solid 1px rgba(0, 0, 0, 0.075)
+			border solid 1px rgba(#000, 0.075)
 			border-radius 6px
 
 	> div
@@ -91,7 +91,7 @@ export default Vue.extend({
 				font-size 12px
 				color #aaa
 				background #fff
-				border solid 1px rgba(0, 0, 0, 0.075)
+				border solid 1px rgba(#000, 0.075)
 				border-radius 6px
 
 				a
diff --git a/src/client/app/desktop/views/pages/user/user.photos.vue b/src/client/app/desktop/views/pages/user/user.photos.vue
index 9f749d5cc..01c4c7b31 100644
--- a/src/client/app/desktop/views/pages/user/user.photos.vue
+++ b/src/client/app/desktop/views/pages/user/user.photos.vue
@@ -41,7 +41,7 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 .photos
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> .title
@@ -52,7 +52,7 @@ export default Vue.extend({
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> i
 			margin-right 4px
diff --git a/src/client/app/desktop/views/pages/user/user.profile.vue b/src/client/app/desktop/views/pages/user/user.profile.vue
index 64acbd86b..29e49f36a 100644
--- a/src/client/app/desktop/views/pages/user/user.profile.vue
+++ b/src/client/app/desktop/views/pages/user/user.profile.vue
@@ -118,7 +118,7 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 .profile
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> *:first-child
diff --git a/src/client/app/desktop/views/pages/welcome.vue b/src/client/app/desktop/views/pages/welcome.vue
index 6bda29326..223be8301 100644
--- a/src/client/app/desktop/views/pages/welcome.vue
+++ b/src/client/app/desktop/views/pages/welcome.vue
@@ -231,14 +231,14 @@ export default Vue.extend({
 						width 410px
 						background #fff
 						border-radius 8px
-						box-shadow 0 0 0 12px rgba(0, 0, 0, 0.1)
+						box-shadow 0 0 0 12px rgba(#000, 0.1)
 						overflow hidden
 
 						> header
 							z-index 1
 							padding 12px 16px
 							color #888d94
-							box-shadow 0 1px 0px rgba(0, 0, 0, 0.1)
+							box-shadow 0 1px 0px rgba(#000, 0.1)
 
 							> div
 								position absolute
diff --git a/src/client/app/desktop/views/widgets/channel.vue b/src/client/app/desktop/views/widgets/channel.vue
index 7e96f8ee3..600cdd531 100644
--- a/src/client/app/desktop/views/widgets/channel.vue
+++ b/src/client/app/desktop/views/widgets/channel.vue
@@ -61,7 +61,7 @@ export default define({
 <style lang="stylus" scoped>
 .mkw-channel
 	background #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 	overflow hidden
 
@@ -73,7 +73,7 @@ export default define({
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> [data-fa]
 			margin-right 4px
diff --git a/src/client/app/desktop/views/widgets/post-form.vue b/src/client/app/desktop/views/widgets/post-form.vue
index 627943588..9c2d60f9b 100644
--- a/src/client/app/desktop/views/widgets/post-form.vue
+++ b/src/client/app/desktop/views/widgets/post-form.vue
@@ -59,7 +59,7 @@ export default define({
 .mkw-post-form
 	background #fff
 	overflow hidden
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	> .title
@@ -70,7 +70,7 @@ export default define({
 		font-size 0.9em
 		font-weight bold
 		color #888
-		box-shadow 0 1px rgba(0, 0, 0, 0.07)
+		box-shadow 0 1px rgba(#000, 0.07)
 
 		> [data-fa]
 			margin-right 4px
diff --git a/src/client/app/desktop/views/widgets/profile.vue b/src/client/app/desktop/views/widgets/profile.vue
index ba66b703b..7958b4829 100644
--- a/src/client/app/desktop/views/widgets/profile.vue
+++ b/src/client/app/desktop/views/widgets/profile.vue
@@ -45,7 +45,7 @@ export default define({
 root(isDark)
 	overflow hidden
 	background isDark ? #282c37 : #fff
-	border solid 1px rgba(0, 0, 0, 0.075)
+	border solid 1px rgba(#000, 0.075)
 	border-radius 6px
 
 	&[data-compact]
@@ -54,14 +54,14 @@ root(isDark)
 			display block
 			width 100%
 			height 100%
-			background rgba(0, 0, 0, 0.5)
+			background rgba(#000, 0.5)
 
 		> .avatar
 			top ((100px - 58px) / 2)
 			left ((100px - 58px) / 2)
 			border none
 			border-radius 100%
-			box-shadow 0 0 16px rgba(0, 0, 0, 0.5)
+			box-shadow 0 0 16px rgba(#000, 0.5)
 
 		> .name
 			position absolute
@@ -70,7 +70,7 @@ root(isDark)
 			margin 0
 			line-height 100px
 			color #fff
-			text-shadow 0 0 8px rgba(0, 0, 0, 0.5)
+			text-shadow 0 0 8px rgba(#000, 0.5)
 
 		> .username
 			display none
diff --git a/src/client/app/mobile/views/components/drive-file-chooser.vue b/src/client/app/mobile/views/components/drive-file-chooser.vue
index 41536afbd..d95d5fa22 100644
--- a/src/client/app/mobile/views/components/drive-file-chooser.vue
+++ b/src/client/app/mobile/views/components/drive-file-chooser.vue
@@ -54,7 +54,7 @@ export default Vue.extend({
 	width 100%
 	height 100%
 	padding 8px
-	background rgba(0, 0, 0, 0.2)
+	background rgba(#000, 0.2)
 
 	> .body
 		width 100%
diff --git a/src/client/app/mobile/views/components/drive-folder-chooser.vue b/src/client/app/mobile/views/components/drive-folder-chooser.vue
index bfd8fbda6..7934fb781 100644
--- a/src/client/app/mobile/views/components/drive-folder-chooser.vue
+++ b/src/client/app/mobile/views/components/drive-folder-chooser.vue
@@ -38,7 +38,7 @@ export default Vue.extend({
 	width 100%
 	height 100%
 	padding 8px
-	background rgba(0, 0, 0, 0.2)
+	background rgba(#000, 0.2)
 
 	> .body
 		width 100%
diff --git a/src/client/app/mobile/views/components/drive.file-detail.vue b/src/client/app/mobile/views/components/drive.file-detail.vue
index c7be7d187..764822e98 100644
--- a/src/client/app/mobile/views/components/drive.file-detail.vue
+++ b/src/client/app/mobile/views/components/drive.file-detail.vue
@@ -139,7 +139,7 @@ export default Vue.extend({
 			max-width 100%
 			max-height 300px
 			margin 0 auto
-			box-shadow 1px 1px 4px rgba(0, 0, 0, 0.2)
+			box-shadow 1px 1px 4px rgba(#000, 0.2)
 
 		> footer
 			padding 8px 8px 0 8px
@@ -226,7 +226,7 @@ export default Vue.extend({
 					background-color #767676
 					background-image none
 					border-color #444
-					box-shadow 0 1px 3px rgba(0, 0, 0, 0.075), inset 0 0 5px rgba(0, 0, 0, 0.2)
+					box-shadow 0 1px 3px rgba(#000, 0.075), inset 0 0 5px rgba(#000, 0.2)
 
 				> [data-fa]
 					margin-right 4px
diff --git a/src/client/app/mobile/views/components/drive.vue b/src/client/app/mobile/views/components/drive.vue
index 7aa666e1b..ef3432a3e 100644
--- a/src/client/app/mobile/views/components/drive.vue
+++ b/src/client/app/mobile/views/components/drive.vue
@@ -474,11 +474,11 @@ export default Vue.extend({
 		overflow auto
 		white-space nowrap
 		font-size 0.9em
-		color rgba(0, 0, 0, 0.67)
+		color rgba(#000, 0.67)
 		-webkit-backdrop-filter blur(12px)
 		backdrop-filter blur(12px)
 		background-color rgba(#fff, 0.75)
-		border-bottom solid 1px rgba(0, 0, 0, 0.13)
+		border-bottom solid 1px rgba(#000, 0.13)
 
 		> p
 		> a
@@ -555,7 +555,7 @@ export default Vue.extend({
 			display inline-block
 			position absolute
 			top 0
-			background rgba(0, 0, 0, 0.2)
+			background rgba(#000, 0.2)
 			border-radius 100%
 
 			animation sk-bounce 2.0s infinite ease-in-out
diff --git a/src/client/app/mobile/views/components/friends-maker.vue b/src/client/app/mobile/views/components/friends-maker.vue
index 961a5f568..ba4abe341 100644
--- a/src/client/app/mobile/views/components/friends-maker.vue
+++ b/src/client/app/mobile/views/components/friends-maker.vue
@@ -57,7 +57,7 @@ export default Vue.extend({
 .mk-friends-maker
 	background #fff
 	border-radius 8px
-	box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+	box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 	> .title
 		margin 0
diff --git a/src/client/app/mobile/views/components/note-detail.vue b/src/client/app/mobile/views/components/note-detail.vue
index 3c7d225ca..36c3f30c6 100644
--- a/src/client/app/mobile/views/components/note-detail.vue
+++ b/src/client/app/mobile/views/components/note-detail.vue
@@ -35,6 +35,7 @@
 		</header>
 		<div class="body">
 			<div class="text">
+				<span v-if="p.isHidden" style="opacity: 0.5">(この投稿は非公開です)</span>
 				<mk-note-html v-if="p.text" :text="p.text" :i="os.i"/>
 			</div>
 			<div class="tags" v-if="p.tags && p.tags.length > 0">
diff --git a/src/client/app/mobile/views/components/notifications.vue b/src/client/app/mobile/views/components/notifications.vue
index a0d893864..8ab66940c 100644
--- a/src/client/app/mobile/views/components/notifications.vue
+++ b/src/client/app/mobile/views/components/notifications.vue
@@ -107,10 +107,11 @@ root(isDark)
 	margin 0 auto
 	background isDark ? #282C37 :#fff
 	border-radius 8px
-	box-shadow 0 0 2px rgba(0, 0, 0, 0.1)
+	box-shadow 0 0 2px rgba(#000, 0.1)
+	overflow hidden
 
 	@media (min-width 500px)
-		box-shadow 0 8px 32px rgba(0, 0, 0, 0.1)
+		box-shadow 0 8px 32px rgba(#000, 0.1)
 
 	.transition
 		.mk-notifications-enter
@@ -147,7 +148,7 @@ root(isDark)
 		width 100%
 		padding 16px
 		color #555
-		border-top solid 1px rgba(0, 0, 0, 0.05)
+		border-top solid 1px rgba(#000, 0.05)
 
 		> [data-fa]
 			margin-right 4px
diff --git a/src/client/app/mobile/views/components/post-form.vue b/src/client/app/mobile/views/components/post-form.vue
index 7b8a52f06..ec1611979 100644
--- a/src/client/app/mobile/views/components/post-form.vue
+++ b/src/client/app/mobile/views/components/post-form.vue
@@ -10,6 +10,10 @@
 	</header>
 	<div class="form">
 		<mk-note-preview v-if="reply" :note="reply"/>
+		<div v-if="visibility == 'specified'" class="visibleUsers">
+			<span v-for="u in visibleUsers">{{ u | userName }}<a @click="removeVisibleUser(u)">[x]</a></span>
+			<a @click="addVisibleUser">+ユーザーを追加</a>
+		</div>
 		<input v-show="useCw" v-model="cw" placeholder="内容への注釈 (オプション)">
 		<textarea v-model="text" ref="text" :disabled="posting" :placeholder="reply ? '%i18n:!@reply-placeholder%' : '%i18n:!@note-placeholder%'"></textarea>
 		<div class="attaches" v-show="files.length != 0">
@@ -27,6 +31,7 @@
 		<button class="poll" @click="poll = true">%fa:chart-pie%</button>
 		<button class="poll" @click="useCw = !useCw">%fa:eye-slash%</button>
 		<button class="geo" @click="geo ? removeGeo() : setGeo()">%fa:map-marker-alt%</button>
+		<button class="visibility" @click="setVisibility" ref="visibilityButton">%fa:lock%</button>
 		<input ref="file" class="file" type="file" accept="image/*" multiple="multiple" @change="onChangeFile"/>
 	</div>
 </div>
@@ -35,11 +40,13 @@
 <script lang="ts">
 import Vue from 'vue';
 import * as XDraggable from 'vuedraggable';
+import MkVisibilityChooser from '../../../common/views/components/visibility-chooser.vue';
 import getKao from '../../../common/scripts/get-kao';
 
 export default Vue.extend({
 	components: {
-		XDraggable
+		XDraggable,
+		MkVisibilityChooser
 	},
 
 	props: ['reply'],
@@ -52,6 +59,8 @@ export default Vue.extend({
 			files: [],
 			poll: false,
 			geo: null,
+			visibility: 'public',
+			visibleUsers: [],
 			useCw: false,
 			cw: null
 		};
@@ -121,6 +130,33 @@ export default Vue.extend({
 			this.geo = null;
 		},
 
+		setVisibility() {
+			const w = (this as any).os.new(MkVisibilityChooser, {
+				source: this.$refs.visibilityButton,
+				compact: true,
+				v: this.visibility
+			});
+			w.$once('chosen', v => {
+				this.visibility = v;
+			});
+		},
+
+		addVisibleUser() {
+			(this as any).apis.input({
+				title: 'ユーザー名を入力してください'
+			}).then(username => {
+				(this as any).api('users/show', {
+					username
+				}).then(user => {
+					this.visibleUsers.push(user);
+				});
+			});
+		},
+
+		removeVisibleUser(user) {
+			this.visibleUsers = this.visibleUsers.filter(u => u != user);
+		},
+
 		clear() {
 			this.text = '';
 			this.files = [];
@@ -145,6 +181,8 @@ export default Vue.extend({
 					heading: isNaN(this.geo.heading) ? null : this.geo.heading,
 					speed: this.geo.speed,
 				} : null,
+				visibility: this.visibility,
+				visibleUserIds: this.visibility == 'specified' ? this.visibleUsers.map(u => u.id) : undefined,
 				viaMobile: viaMobile
 			}).then(data => {
 				this.$emit('note');
@@ -169,33 +207,33 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 @import '~const.styl'
 
-.mk-post-form
+root(isDark)
 	max-width 500px
 	width calc(100% - 16px)
 	margin 8px auto
-	background #fff
+	background isDark ? #282C37 : #fff
 	border-radius 8px
-	box-shadow 0 0 2px rgba(0, 0, 0, 0.1)
+	box-shadow 0 0 2px rgba(#000, 0.1)
 
 	@media (min-width 500px)
 		margin 16px auto
 		width calc(100% - 32px)
-		box-shadow 0 8px 32px rgba(0, 0, 0, 0.1)
+		box-shadow 0 8px 32px rgba(#000, 0.1)
 
 	@media (min-width 600px)
 		margin 32px auto
 
 	> header
-		z-index 1
+		z-index 1000
 		height 50px
-		box-shadow 0 1px 0 0 rgba(0, 0, 0, 0.1)
+		box-shadow 0 1px 0 0 isDark ? rgba(#000, 0.2) : rgba(#000, 0.1)
 
 		> .cancel
 			padding 0
 			width 50px
 			line-height 50px
 			font-size 24px
-			color #555
+			color isDark ? #9baec8 : #555
 
 		> div
 			position absolute
@@ -229,6 +267,38 @@ export default Vue.extend({
 		> .mk-note-preview
 			padding 16px
 
+		> .visibleUsers
+			margin-bottom 8px
+			font-size 14px
+
+			> span
+				margin-right 16px
+				color isDark ? #fff : #666
+
+		> input
+			z-index 1
+
+		> input
+		> textarea
+			display block
+			padding 12px
+			margin 0
+			width 100%
+			font-size 16px
+			color isDark ? #fff : #333
+			background isDark ? #191d23 : #fff
+			border none
+			border-radius 0
+			box-shadow 0 1px 0 0 isDark ? rgba(#000, 0.2) : rgba(#000, 0.1)
+
+			&:disabled
+				opacity 0.5
+
+		> textarea
+			max-width 100%
+			min-width 100%
+			min-height 80px
+
 		> .attaches
 
 			> .files
@@ -262,31 +332,12 @@ export default Vue.extend({
 		> .file
 			display none
 
-		> input
-		> textarea
-			display block
-			padding 12px
-			margin 0
-			width 100%
-			font-size 16px
-			color #333
-			border none
-			border-bottom solid 1px #ddd
-			border-radius 0
-
-			&:disabled
-				opacity 0.5
-
-		> textarea
-			max-width 100%
-			min-width 100%
-			min-height 80px
-
 		> .upload
 		> .drive
 		> .kao
 		> .poll
 		> .geo
+		> .visibility
 			display inline-block
 			padding 0
 			margin 0
@@ -300,5 +351,10 @@ export default Vue.extend({
 			border-radius 0
 			box-shadow none
 
-</style>
+.mk-post-form[data-darkmode]
+	root(true)
 
+.mk-post-form:not([data-darkmode])
+	root(false)
+
+</style>
diff --git a/src/client/app/mobile/views/components/users-list.vue b/src/client/app/mobile/views/components/users-list.vue
index 67a38a895..617506745 100644
--- a/src/client/app/mobile/views/components/users-list.vue
+++ b/src/client/app/mobile/views/components/users-list.vue
@@ -74,7 +74,7 @@ export default Vue.extend({
 		justify-content center
 		margin 0 auto
 		max-width 600px
-		border-bottom solid 1px rgba(0, 0, 0, 0.2)
+		border-bottom solid 1px rgba(#000, 0.2)
 
 		> span
 			display block
@@ -97,7 +97,7 @@ export default Vue.extend({
 				font-size 12px
 				line-height 1
 				color #fff
-				background rgba(0, 0, 0, 0.3)
+				background rgba(#000, 0.3)
 				border-radius 20px
 
 	> .users
@@ -106,14 +106,14 @@ export default Vue.extend({
 		width calc(100% - 16px)
 		background #fff
 		border-radius 8px
-		box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+		box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 		@media (min-width 500px)
 			margin 16px auto
 			width calc(100% - 32px)
 
 		> *
-			border-bottom solid 1px rgba(0, 0, 0, 0.05)
+			border-bottom solid 1px rgba(#000, 0.05)
 
 	> .no
 		margin 0
diff --git a/src/client/app/mobile/views/components/widget-container.vue b/src/client/app/mobile/views/components/widget-container.vue
index 7319c9084..1bdc87576 100644
--- a/src/client/app/mobile/views/components/widget-container.vue
+++ b/src/client/app/mobile/views/components/widget-container.vue
@@ -28,7 +28,7 @@ export default Vue.extend({
 .mk-widget-container
 	background #eee
 	border-radius 8px
-	box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+	box-shadow 0 0 0 1px rgba(#000, 0.2)
 	overflow hidden
 
 	&.hideHeader
diff --git a/src/client/app/mobile/views/pages/home.vue b/src/client/app/mobile/views/pages/home.vue
index e43c5876e..f69c4d9c6 100644
--- a/src/client/app/mobile/views/pages/home.vue
+++ b/src/client/app/mobile/views/pages/home.vue
@@ -121,7 +121,7 @@ root(isDark)
 			margin 0 auto
 			background isDark ? #272f3a : #fff
 			border-radius 8px
-			box-shadow 0 0 16px rgba(0, 0, 0, 0.1)
+			box-shadow 0 0 16px rgba(#000, 0.1)
 
 			$balloon-size = 16px
 
diff --git a/src/client/app/mobile/views/pages/profile-setting.vue b/src/client/app/mobile/views/pages/profile-setting.vue
index d0b9095ce..7048cdef3 100644
--- a/src/client/app/mobile/views/pages/profile-setting.vue
+++ b/src/client/app/mobile/views/pages/profile-setting.vue
@@ -136,7 +136,7 @@ export default Vue.extend({
 .form
 	position relative
 	background #fff
-	box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+	box-shadow 0 0 0 1px rgba(#000, 0.2)
 	border-radius 8px
 
 	&:before
@@ -145,7 +145,7 @@ export default Vue.extend({
 		position absolute
 		bottom -20px
 		left calc(50% - 10px)
-		border-top solid 10px rgba(0, 0, 0, 0.2)
+		border-top solid 10px rgba(#000, 0.2)
 		border-right solid 10px transparent
 		border-bottom solid 10px transparent
 		border-left solid 10px transparent
diff --git a/src/client/app/mobile/views/pages/search.vue b/src/client/app/mobile/views/pages/search.vue
index 6c80de3aa..f038a6f81 100644
--- a/src/client/app/mobile/views/pages/search.vue
+++ b/src/client/app/mobile/views/pages/search.vue
@@ -84,7 +84,7 @@ export default Vue.extend({
 	width calc(100% - 16px)
 	background #fff
 	border-radius 8px
-	box-shadow 0 0 0 1px rgba(0, 0, 0, 0.2)
+	box-shadow 0 0 0 1px rgba(#000, 0.2)
 
 	@media (min-width 500px)
 		margin 16px auto
diff --git a/src/client/app/mobile/views/pages/selectdrive.vue b/src/client/app/mobile/views/pages/selectdrive.vue
index 741559ed0..d730e4fcf 100644
--- a/src/client/app/mobile/views/pages/selectdrive.vue
+++ b/src/client/app/mobile/views/pages/selectdrive.vue
@@ -62,7 +62,7 @@ export default Vue.extend({
 		width 100%
 		z-index 1000
 		background #fff
-		box-shadow 0 1px rgba(0, 0, 0, 0.1)
+		box-shadow 0 1px rgba(#000, 0.1)
 
 		> h1
 			margin 0
diff --git a/src/client/app/mobile/views/pages/settings.vue b/src/client/app/mobile/views/pages/settings.vue
index ebf14f68f..0e9c5ea96 100644
--- a/src/client/app/mobile/views/pages/settings.vue
+++ b/src/client/app/mobile/views/pages/settings.vue
@@ -62,7 +62,7 @@ export default Vue.extend({
 		width calc(100% - 32px)
 		list-style none
 		background #fff
-		border solid 1px rgba(0, 0, 0, 0.2)
+		border solid 1px rgba(#000, 0.2)
 		border-radius $radius
 
 		> li
@@ -70,7 +70,7 @@ export default Vue.extend({
 			border-bottom solid 1px #ddd
 
 			&:hover
-				background rgba(0, 0, 0, 0.1)
+				background rgba(#000, 0.1)
 
 			&:first-child
 				border-top-left-radius $radius
diff --git a/src/client/app/mobile/views/pages/signup.vue b/src/client/app/mobile/views/pages/signup.vue
index 9dc07a4b8..b8245beb0 100644
--- a/src/client/app/mobile/views/pages/signup.vue
+++ b/src/client/app/mobile/views/pages/signup.vue
@@ -40,7 +40,7 @@ export default Vue.extend({
 
 	.form
 		background #fff
-		border solid 1px rgba(0, 0, 0, 0.2)
+		border solid 1px rgba(#000, 0.2)
 		border-radius 8px
 		overflow hidden
 
diff --git a/src/client/app/mobile/views/pages/welcome.vue b/src/client/app/mobile/views/pages/welcome.vue
index 1bc7ffd86..485996870 100644
--- a/src/client/app/mobile/views/pages/welcome.vue
+++ b/src/client/app/mobile/views/pages/welcome.vue
@@ -108,7 +108,7 @@ export default Vue.extend({
 		.form
 			margin-bottom 16px
 			background #fff
-			border solid 1px rgba(0, 0, 0, 0.2)
+			border solid 1px rgba(#000, 0.2)
 			border-radius 8px
 			overflow hidden
 
@@ -131,7 +131,7 @@ export default Vue.extend({
 						margin 0 0 16px 0
 						width 100%
 						font-size 1em
-						color rgba(0, 0, 0, 0.7)
+						color rgba(#000, 0.7)
 						background #fff
 						outline none
 						border solid 1px #ddd
@@ -156,7 +156,7 @@ export default Vue.extend({
 							background-color #767676
 							background-image none
 							border-color #444
-							box-shadow 0 1px 3px rgba(0, 0, 0, 0.075), inset 0 0 5px rgba(0, 0, 0, 0.2)
+							box-shadow 0 1px 3px rgba(#000, 0.075), inset 0 0 5px rgba(#000, 0.2)
 
 				> div
 					padding 16px
@@ -164,7 +164,7 @@ export default Vue.extend({
 
 		> .tl
 			background #fff
-			border solid 1px rgba(0, 0, 0, 0.2)
+			border solid 1px rgba(#000, 0.2)
 			border-radius 8px
 			overflow hidden
 
diff --git a/src/client/app/mobile/views/widgets/profile.vue b/src/client/app/mobile/views/widgets/profile.vue
index 502f886ce..59c1ec7c0 100644
--- a/src/client/app/mobile/views/widgets/profile.vue
+++ b/src/client/app/mobile/views/widgets/profile.vue
@@ -34,7 +34,7 @@ export default define({
 	display block
 	width 100%
 	height 100%
-	background rgba(0, 0, 0, 0.5)
+	background rgba(#000, 0.5)
 
 .avatar
 	display block
@@ -47,7 +47,7 @@ export default define({
 	left ((100px - 58px) / 2)
 	border none
 	border-radius 100%
-	box-shadow 0 0 16px rgba(0, 0, 0, 0.5)
+	box-shadow 0 0 16px rgba(#000, 0.5)
 
 .name
 	display block
@@ -58,6 +58,6 @@ export default define({
 	line-height 100px
 	color #fff
 	font-weight bold
-	text-shadow 0 0 8px rgba(0, 0, 0, 0.5)
+	text-shadow 0 0 8px rgba(#000, 0.5)
 
 </style>
diff --git a/src/renderers/get-note-summary.ts b/src/renderers/get-note-summary.ts
index fc7482ca1..dfc05ebfd 100644
--- a/src/renderers/get-note-summary.ts
+++ b/src/renderers/get-note-summary.ts
@@ -3,6 +3,10 @@
  * @param {*} note 投稿
  */
 const summarize = (note: any): string => {
+	if (note.isHidden) {
+		return '(非公開の投稿)';
+	}
+
 	let summary = '';
 
 	// チャンネル