diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3b59251f91..a4996cfe47 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,6 +15,7 @@
 	- 設定により、リアクション一覧を全員に公開することも可能
 - クライアント: ユーザー検索の精度を強化
 - クライアント: 新しいライトテーマを追加
+- クライアント: 新しいダークテーマを追加
 - API: ユーザーのリアクション一覧を取得する users/reactions を追加
 - API: users/search および users/search-by-username-and-host を強化
 - ミュート及びブロックのインポートを行えるように
diff --git a/src/client/scripts/theme.ts b/src/client/scripts/theme.ts
index ad1b033edf..8b63821293 100644
--- a/src/client/scripts/theme.ts
+++ b/src/client/scripts/theme.ts
@@ -27,6 +27,7 @@ export const builtinThemes = [
 	require('@client/themes/d-astro.json5'),
 	require('@client/themes/d-future.json5'),
 	require('@client/themes/d-botanical.json5'),
+	require('@client/themes/d-pumpkin.json5'),
 	require('@client/themes/d-black.json5'),
 ] as Theme[];
 
diff --git a/src/client/themes/d-astro.json5 b/src/client/themes/d-astro.json5
index 2350e3d46d..c6a927ec3a 100644
--- a/src/client/themes/d-astro.json5
+++ b/src/client/themes/d-astro.json5
@@ -1,7 +1,7 @@
 {
 	id: '080a01c5-377d-4fbb-88cc-6bb5d04977ea',
 	base: 'dark',
-	name: 'Mi Astro',
+	name: 'Mi Astro Dark',
 	author: 'syuilo',
 	props: {
 		bg: '#232125',
diff --git a/src/client/themes/d-future.json5 b/src/client/themes/d-future.json5
index 1882609121..b6fa1ab0c1 100644
--- a/src/client/themes/d-future.json5
+++ b/src/client/themes/d-future.json5
@@ -1,7 +1,7 @@
 {
 	id: '32a637ef-b47a-4775-bb7b-bacbb823f865',
 
-	name: 'Mi Future',
+	name: 'Mi Future Dark',
 	author: 'syuilo',
 
 	base: 'dark',
diff --git a/src/client/themes/d-persimmon.json5 b/src/client/themes/d-persimmon.json5
index 11e9994f5e..e36265ff10 100644
--- a/src/client/themes/d-persimmon.json5
+++ b/src/client/themes/d-persimmon.json5
@@ -1,7 +1,7 @@
 {
 	id: 'c503d768-7c70-4db2-a4e6-08264304bc8d',
 
-	name: 'Mi Persimmon',
+	name: 'Mi Persimmon Dark',
 	author: 'syuilo',
 
 	base: 'dark',
diff --git a/src/client/themes/d-pumpkin.json5 b/src/client/themes/d-pumpkin.json5
new file mode 100644
index 0000000000..064ca4577b
--- /dev/null
+++ b/src/client/themes/d-pumpkin.json5
@@ -0,0 +1,88 @@
+{
+	id: '0b64fef3-02c7-20b5-dd87-b3f77e2b4301',
+
+	name: 'Mi Pumpkin Dark',
+	author: 'syuilo',
+
+	base: 'dark',
+
+	props: {
+		X2: ':darken<2<@panel',
+		X3: 'rgba(255, 255, 255, 0.05)',
+		X4: 'rgba(255, 255, 255, 0.1)',
+		X5: 'rgba(255, 255, 255, 0.05)',
+		X6: 'rgba(255, 255, 255, 0.15)',
+		X7: 'rgba(255, 255, 255, 0.05)',
+		X8: ':lighten<5<@accent',
+		X9: ':darken<5<@accent',
+		bg: 'rgb(37, 32, 47)',
+		fg: '#e0d5c0',
+		X10: ':alpha<0.4<@accent',
+		X11: 'rgba(0, 0, 0, 0.3)',
+		X12: 'rgba(255, 255, 255, 0.1)',
+		X13: 'rgba(255, 255, 255, 0.15)',
+		X14: ':alpha<0.5<@navBg',
+		X15: ':alpha<0<@panel',
+		X16: ':alpha<0.7<@panel',
+		X17: ':alpha<0.8<@bg',
+		cwBg: '#687390',
+		cwFg: '#393f4f',
+		link: 'rgb(172, 193, 68)',
+		warn: '#ecb637',
+		badge: '#31b1ce',
+		error: '#ec4137',
+		focus: ':alpha<0.3<@accent',
+		navBg: '@panel',
+		navFg: '@fg',
+		panel: ':lighten<3<@bg',
+		popup: ':lighten<3<@panel',
+		accent: 'rgb(242, 133, 36)',
+		header: ':alpha<0.7<@panel',
+		infoBg: '#253142',
+		infoFg: '#fff',
+		renote: 'rgb(110, 179, 72)',
+		shadow: 'rgba(0, 0, 0, 0.3)',
+		divider: 'rgba(255, 255, 255, 0.1)',
+		hashtag: 'rgb(188, 90, 255)',
+		mention: 'rgb(72, 179, 139)',
+		modalBg: 'rgba(0, 0, 0, 0.5)',
+		success: '#86b300',
+		buttonBg: 'rgba(255, 255, 255, 0.05)',
+		switchBg: 'rgba(255, 255, 255, 0.15)',
+		acrylicBg: ':alpha<0.5<@bg',
+		cwHoverBg: '#707b97',
+		indicator: '@accent',
+		mentionMe: '@accent',
+		messageBg: '@bg',
+		navActive: '@accent',
+		accentedBg: ':alpha<0.15<@accent',
+		fgOnAccent: '#000',
+		infoWarnBg: '#42321c',
+		infoWarnFg: '#ffbd3e',
+		navHoverFg: ':lighten<17<@fg',
+		dateLabelFg: '@fg',
+		inputBorder: 'rgba(255, 255, 255, 0.1)',
+		panelBorder: '" solid 1px var(--divider)',
+		accentDarken: ':darken<10<@accent',
+		acrylicPanel: ':alpha<0.5<@panel',
+		navIndicator: '@indicator',
+		accentLighten: ':lighten<10<@accent',
+		buttonHoverBg: 'rgba(255, 255, 255, 0.1)',
+		driveFolderBg: ':alpha<0.3<@accent',
+		fgHighlighted: ':lighten<3<@fg',
+		fgTransparent: ':alpha<0.5<@fg',
+		panelHeaderBg: ':lighten<3<@panel',
+		panelHeaderFg: '@fg',
+		buttonGradateA: '@accent',
+		buttonGradateB: ':hue<20<@accent',
+		htmlThemeColor: '@bg',
+		panelHighlight: ':lighten<3<@panel',
+		listItemHoverBg: 'rgba(255, 255, 255, 0.03)',
+		scrollbarHandle: 'rgba(255, 255, 255, 0.2)',
+		inputBorderHover: 'rgba(255, 255, 255, 0.2)',
+		wallpaperOverlay: 'rgba(0, 0, 0, 0.5)',
+		fgTransparentWeak: ':alpha<0.75<@fg',
+		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
+		scrollbarHandleHover: 'rgba(255, 255, 255, 0.4)',
+	},
+}
diff --git a/src/client/themes/l-apricot.json5 b/src/client/themes/l-apricot.json5
index 74cb24d407..1ed5525575 100644
--- a/src/client/themes/l-apricot.json5
+++ b/src/client/themes/l-apricot.json5
@@ -1,7 +1,7 @@
 {
 	id: '0ff48d43-aab3-46e7-ab12-8492110d2e2b',
 
-	name: 'Mi Apricot',
+	name: 'Mi Apricot Light',
 	author: 'syuilo',
 
 	base: 'light',
diff --git a/src/client/themes/l-rainy.json5 b/src/client/themes/l-rainy.json5
index 1edde1cabf..283dd74c6c 100644
--- a/src/client/themes/l-rainy.json5
+++ b/src/client/themes/l-rainy.json5
@@ -1,7 +1,7 @@
 {
 	id: 'a58a0abb-ff8c-476a-8dec-0ad7837e7e96',
 
-	name: 'Mi Rainy',
+	name: 'Mi Rainy Light',
 	author: 'syuilo',
 
 	base: 'light',
diff --git a/src/client/themes/l-vivid.json5 b/src/client/themes/l-vivid.json5
index 0f4abe0a45..b3c08f38ae 100644
--- a/src/client/themes/l-vivid.json5
+++ b/src/client/themes/l-vivid.json5
@@ -1,7 +1,7 @@
 {
 	id: '6128c2a9-5c54-43fe-a47d-17942356470b',
 
-	name: 'Mi Vivid',
+	name: 'Mi Vivid Light',
 	author: 'syuilo',
 
 	base: 'light',