diff --git a/assets/title-dark.svg b/assets/title-dark.svg
new file mode 100644
index 000000000..10139024a
--- /dev/null
+++ b/assets/title-dark.svg
@@ -0,0 +1,140 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="614.71039"
+   height="205.08009"
+   viewBox="0 0 162.64213 54.260776"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.1 r15371"
+   sodipodi:docname="misskey.svg"
+   inkscape:export-filename="C:\Users\Takumiya_Cho\Desktop\misskey.png"
+   inkscape:export-xdpi="96"
+   inkscape:export-ydpi="96">
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+       is_visible="true"
+       steps="1"
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+       helper_size="0"
+       simplify_individual_paths="false"
+       simplify_just_coalesce="false"
+       simplifyindividualpaths="false"
+       simplifyJustCoalesce="false" />
+    <inkscape:path-effect
+       effect="simplify"
+       id="path-effect5104"
+       is_visible="true"
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+       smooth_angles="360"
+       helper_size="0"
+       simplify_individual_paths="false"
+       simplify_just_coalesce="false"
+       simplifyindividualpaths="false"
+       simplifyJustCoalesce="false" />
+  </defs>
+  <sodipodi:namedview
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+     pagecolor="#ffffff"
+     bordercolor="#666666"
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+     inkscape:pageshadow="2"
+     inkscape:zoom="0.9899495"
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+     inkscape:cy="79.043895"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     units="px"
+     inkscape:snap-bbox="true"
+     inkscape:bbox-nodes="true"
+     inkscape:snap-bbox-edge-midpoints="false"
+     inkscape:snap-smooth-nodes="true"
+     inkscape:snap-center="true"
+     inkscape:snap-page="true"
+     inkscape:window-width="1920"
+     inkscape:window-height="1017"
+     inkscape:window-x="-8"
+     inkscape:window-y="1072"
+     inkscape:window-maximized="1"
+     inkscape:object-paths="true"
+     inkscape:bbox-paths="true"
+     fit-margin-top="50"
+     fit-margin-left="50"
+     fit-margin-bottom="20"
+     fit-margin-right="50" />
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+     id="metadata5">
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+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+      </cc:Work>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="レイヤー 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(-11.097531,-173.29664)">
+    <g
+       transform="matrix(0.28612302,0,0,0.28612302,17.176981,141.74334)"
+       id="text4489-6"
+       style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-size:141.03404236px;line-height:476.69509888px;font-family:'OTADESIGN Rounded';-inkscape-font-specification:'OTADESIGN Rounded';letter-spacing:0px;word-spacing:0px;fill:#fff;fill-opacity:1;stroke:none;stroke-width:0.92471898px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       aria-label="Mi">
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+         inkscape:connector-curvature="0"
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+      <path
+         inkscape:connector-curvature="0"
+         id="path5212"
+         style="font-style:normal;font-variant:normal;font-weight:normal;font-stretch:normal;font-family:'OTADESIGN Rounded';-inkscape-font-specification:'OTADESIGN Rounded';fill:#fff;fill-opacity:1;stroke-width:0.92471898px"
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+    </g>
+    <path
+       inkscape:connector-curvature="0"
+       id="path5199"
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+  </g>
+</svg>
diff --git a/src/client/app/desktop/views/pages/welcome.vue b/src/client/app/desktop/views/pages/welcome.vue
index fb98f6974..bb3653f40 100644
--- a/src/client/app/desktop/views/pages/welcome.vue
+++ b/src/client/app/desktop/views/pages/welcome.vue
@@ -1,7 +1,11 @@
 <template>
 <div class="mk-welcome">
+	<button @click="dark">
+		<template v-if="_darkmode_">%fa:moon%</template>
+		<template v-else>%fa:R moon%</template>
+	</button>
 	<main>
-		<img src="assets/title.svg" alt="Misskey">
+		<img :src="_darkmode_ ? 'assets/title-dark.svg' : 'assets/title.svg'" alt="Misskey">
 		<p><button class="signup" @click="signup">%i18n:@signup-button%</button><button class="signin" @click="signin">%i18n:@signin-button%</button></p>
 
 		<div class="tl">
@@ -44,6 +48,9 @@ export default Vue.extend({
 		},
 		signin() {
 			this.$modal.show('signin');
+		},
+		dark() {
+			(this as any)._updateDarkmode_(!(this as any)._darkmode_);
 		}
 	}
 });
@@ -59,18 +66,25 @@ export default Vue.extend({
 <style lang="stylus" scoped>
 @import '~const.styl'
 
-@import url('https://fonts.googleapis.com/css?family=Sarpanch:700')
-
-.mk-welcome
+root(isDark)
 	display flex
 	flex-direction column
 	flex 1
 
+	> button
+		position absolute
+		z-index 1
+		top 0
+		left 0
+		padding 16px
+		font-size 18px
+		color isDark ? #fff : #555
+
 	> main
 		flex 1
 		padding 64px 0 0 0
 		text-align center
-		color #555
+		color isDark ? #9aa4b3 : #555
 
 		> img
 			width 350px
@@ -102,7 +116,7 @@ export default Vue.extend({
 
 			.signin
 				&:hover
-					color #000
+					color isDark ? #fff : #000
 
 		> .tl
 			margin 32px auto 0 auto
@@ -149,7 +163,7 @@ export default Vue.extend({
 
 	> footer
 		font-size 12px
-		color #949ea5
+		color isDark ? #949ea5 : #737c82
 
 		> div
 			margin 0 auto
@@ -161,6 +175,12 @@ export default Vue.extend({
 				font-size 10px
 				opacity 0.7
 
+.mk-welcome[data-darkmode]
+	root(true)
+
+.mk-welcome:not([data-darkmode])
+	root(false)
+
 </style>
 
 <style lang="stylus" module>