diff --git a/assets/title-dark.svg b/assets/title-dark.svg
new file mode 100644
index 0000000000..10139024ad
--- /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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+     id="defs2">
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+       id="path-effect5115"
+       is_visible="true"
+       steps="1"
+       threshold="0.000408163"
+       smooth_angles="360"
+       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"
+       steps="1"
+       threshold="0.000408163"
+       smooth_angles="360"
+       helper_size="0"
+       simplify_individual_paths="false"
+       simplify_just_coalesce="false"
+       simplifyindividualpaths="false"
+       simplifyJustCoalesce="false" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="0.9899495"
+     inkscape:cx="370.82839"
+     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" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <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">
+      <path
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+         inkscape:connector-curvature="0"
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+         d="m 75.196381,231.17126 c -5.855419,0.0202 -10.885068,-3.50766 -13.2572,-7.61584 -1.266603,-1.79454 -3.772419,-2.43291 -3.807919,0 v 11.2332 c 0,4.51309 -1.645397,8.41504 -4.936191,11.70583 -3.196772,3.19677 -7.098714,4.79516 -11.705826,4.79516 -4.513089,0 -8.415031,-1.59839 -11.705825,-4.79516 -3.196772,-3.29079 -4.795158,-7.19274 -4.795158,-11.70583 v -61.7729 c 0,-3.47884 0.987238,-6.6286 2.961715,-9.44928 2.068499,-2.91471 4.701135,-4.9362 7.897906,-6.06447 1.786431,-0.65816 3.666885,-0.98724 5.641362,-0.98724 5.077225,0 9.308247,1.97448 12.693064,5.92343 1.786431,1.97448 2.820681,3.00873 3.102749,3.10275 0,0 13.408119,16.21319 13.78421,16.49526 0.376091,0.28206 1.480789,2.43848 4.127113,2.43848 2.646324,0 3.89218,-2.15642 4.26827,-2.43848 0.376091,-0.28207 13.784088,-16.49526 13.784088,-16.49526 0.09402,0.094 1.081261,-0.94022 2.961715,-3.10275 3.478837,-3.94895 7.756866,-5.92343 12.834096,-5.92343 1.88045,0 3.76091,0.32908 5.64136,0.98724 3.19677,1.12827 5.7824,3.14976 7.75688,6.06447 2.06849,2.82068 3.10274,5.97044 3.10274,9.44928 v 61.7729 c 0,4.51309 -1.6454,8.41504 -4.93619,11.70583 -3.19677,3.19677 -7.09871,4.79516 -11.70582,4.79516 -4.51309,0 -8.41504,-1.59839 -11.705828,-4.79516 -3.196772,-3.29079 -4.795158,-7.19274 -4.795158,-11.70583 v -11.2332 c -0.277898,-3.06563 -2.987588,-1.13379 -3.948953,0 -2.538613,4.70114 -7.401781,7.59567 -13.2572,7.61584 z" />
+      <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 fb98f6974e..bb3653f403 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>