diff --git a/packages/client/src/scripts/theme.ts b/packages/client/src/scripts/theme.ts
index 77d1df082..02ac77b59 100644
--- a/packages/client/src/scripts/theme.ts
+++ b/packages/client/src/scripts/theme.ts
@@ -25,6 +25,7 @@ export const getBuiltinThemes = () => Promise.all(
 		'l-vivid',
 		'l-cherry',
 		'l-sushi',
+		'l-u0',
 
 		'd-dark',
 		'd-persimmon',
@@ -35,6 +36,7 @@ export const getBuiltinThemes = () => Promise.all(
 		'd-green-orange',
 		'd-cherry',
 		'd-ice',
+		'd-u0',
 	].map(name => import(`../themes/${name}.json5`).then(({ default: _default }): Theme => _default)),
 );
 
diff --git a/packages/client/src/themes/d-u0.json5 b/packages/client/src/themes/d-u0.json5
new file mode 100644
index 000000000..b270f809a
--- /dev/null
+++ b/packages/client/src/themes/d-u0.json5
@@ -0,0 +1,88 @@
+{
+	id: '7a5bc13b-df8f-4d44-8e94-4452f0c634bb',
+	base: 'dark',
+	name: 'Mi U0 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: '#172426',
+		fg: '#dadada',
+		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: '@accent',
+		warn: '#ecb637',
+		badge: '#31b1ce',
+		error: '#ec4137',
+		focus: ':alpha<0.3<@accent',
+		navBg: '@panel',
+		navFg: '@fg',
+		panel: ':lighten<3<@bg',
+		popup: ':lighten<3<@panel',
+		accent: '#00a497',
+		header: ':alpha<0.7<@panel',
+		infoBg: '#253142',
+		infoFg: '#fff',
+		renote: '@accent',
+		shadow: 'rgba(0, 0, 0, 0.3)',
+		divider: 'rgba(255, 255, 255, 0.1)',
+		hashtag: '#e6b422',
+		mention: '@accent',
+		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: '@mention',
+		messageBg: '@bg',
+		navActive: '@accent',
+		accentedBg: ':alpha<0.15<@accent',
+		codeNumber: '#cfff9e',
+		codeString: '#ffb675',
+		fgOnAccent: '#fff',
+		infoWarnBg: '#42321c',
+		infoWarnFg: '#ffbd3e',
+		navHoverFg: ':lighten<17<@fg',
+		codeBoolean: '#c59eff',
+		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)',
+		deckDivider: '#142022',
+	},
+}
diff --git a/packages/client/src/themes/l-u0.json5 b/packages/client/src/themes/l-u0.json5
new file mode 100644
index 000000000..03b114ba3
--- /dev/null
+++ b/packages/client/src/themes/l-u0.json5
@@ -0,0 +1,87 @@
+{
+	id: 'e2c940b5-6e9a-4c03-b738-261c720c426d',
+	base: 'light',
+	name: 'Mi U0 Light',
+	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: '#e7e7eb',
+		fg: '#5f5f5f',
+		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: '@accent',
+		warn: '#ecb637',
+		badge: '#31b1ce',
+		error: '#ec4137',
+		focus: ':alpha<0.3<@accent',
+		navBg: '@panel',
+		navFg: '@fg',
+		panel: ':lighten<3<@bg',
+		popup: ':lighten<3<@panel',
+		accent: '#478384',
+		header: ':alpha<0.7<@panel',
+		infoBg: '#253142',
+		infoFg: '#fff',
+		renote: '@accent',
+		shadow: 'rgba(0, 0, 0, 0.3)',
+		divider: '#4646461a',
+		hashtag: '#1f3134',
+		mention: '@accent',
+		modalBg: 'rgba(0, 0, 0, 0.5)',
+		success: '#86b300',
+		buttonBg: '#0000000d',
+		switchBg: 'rgba(255, 255, 255, 0.15)',
+		acrylicBg: ':alpha<0.5<@bg',
+		cwHoverBg: '#707b97',
+		indicator: '@accent',
+		mentionMe: '@mention',
+		messageBg: '@bg',
+		navActive: '@accent',
+		accentedBg: ':alpha<0.15<@accent',
+		codeNumber: '#cfff9e',
+		codeString: '#ffb675',
+		fgOnAccent: '#fff',
+		infoWarnBg: '#42321c',
+		infoWarnFg: '#ffbd3e',
+		navHoverFg: ':lighten<17<@fg',
+		codeBoolean: '#c59eff',
+		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: '#0000001a',
+		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: '#74747433',
+		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)',
+	},
+}