diff --git a/packages/frontend/src/components/MkButton.vue b/packages/frontend/src/components/MkButton.vue
index 9560efb7d9..fb9c036fbc 100644
--- a/packages/frontend/src/components/MkButton.vue
+++ b/packages/frontend/src/components/MkButton.vue
@@ -171,11 +171,11 @@ function onMousedown(evt: MouseEvent): void {
 		background: var(--accent);
 
 		&:not(:disabled):hover {
-			background: var(--X8);
+			background: hsl(from var(--accent) h s calc(l + 5));
 		}
 
 		&:not(:disabled):active {
-			background: var(--X8);
+			background: hsl(from var(--accent) h s calc(l + 5));
 		}
 	}
 
@@ -220,11 +220,11 @@ function onMousedown(evt: MouseEvent): void {
 		background: linear-gradient(90deg, var(--buttonGradateA), var(--buttonGradateB));
 
 		&:not(:disabled):hover {
-			background: linear-gradient(90deg, var(--X8), var(--X8));
+			background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 		}
 
 		&:not(:disabled):active {
-			background: linear-gradient(90deg, var(--X8), var(--X8));
+			background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 		}
 	}
 
diff --git a/packages/frontend/src/components/MkChannelPreview.vue b/packages/frontend/src/components/MkChannelPreview.vue
index c30cb66c07..3c0874a1eb 100644
--- a/packages/frontend/src/components/MkChannelPreview.vue
+++ b/packages/frontend/src/components/MkChannelPreview.vue
@@ -117,7 +117,7 @@ const bannerStyle = computed(() => {
 			left: 0;
 			width: 100%;
 			height: 64px;
-			background: linear-gradient(0deg, var(--panel), var(--X15));
+			background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 		}
 
 		> .name {
diff --git a/packages/frontend/src/components/MkContainer.vue b/packages/frontend/src/components/MkContainer.vue
index a399acd47f..8ad653a0bf 100644
--- a/packages/frontend/src/components/MkContainer.vue
+++ b/packages/frontend/src/components/MkContainer.vue
@@ -216,7 +216,7 @@ onUnmounted(() => {
 			left: 0;
 			width: 100%;
 			height: 64px;
-			background: linear-gradient(0deg, var(--panel), var(--X15));
+			background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 
 			> .fadeLabel {
 				display: inline-block;
diff --git a/packages/frontend/src/components/MkNote.vue b/packages/frontend/src/components/MkNote.vue
index 19681ea84b..17ca33e94c 100644
--- a/packages/frontend/src/components/MkNote.vue
+++ b/packages/frontend/src/components/MkNote.vue
@@ -879,7 +879,7 @@ function emitUpdReaction(emoji: string, delta: number) {
 	z-index: 2;
 	width: 100%;
 	height: 64px;
-	background: linear-gradient(0deg, var(--panel), var(--X15));
+	background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 
 	&:hover > .collapsedLabel {
 		background: var(--panelHighlight);
diff --git a/packages/frontend/src/components/MkOmit.vue b/packages/frontend/src/components/MkOmit.vue
index 100a025653..ee1f15c189 100644
--- a/packages/frontend/src/components/MkOmit.vue
+++ b/packages/frontend/src/components/MkOmit.vue
@@ -62,7 +62,7 @@ onUnmounted(() => {
 			left: 0;
 			width: 100%;
 			height: 64px;
-			background: linear-gradient(0deg, var(--panel), var(--X15));
+			background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 
 			> .fadeLabel {
 				display: inline-block;
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 51ec941c97..f0826fcf4e 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -1128,13 +1128,13 @@ defineExpose({
 
 	&:not(:disabled):hover {
 		> .inner {
-			background: linear-gradient(90deg, var(--X8), var(--X8));
+			background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 		}
 	}
 
 	&:not(:disabled):active {
 		> .inner {
-			background: linear-gradient(90deg, var(--X8), var(--X8));
+			background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 		}
 	}
 }
diff --git a/packages/frontend/src/components/MkSubNoteContent.vue b/packages/frontend/src/components/MkSubNoteContent.vue
index e9d1fa9a89..d79e1df7f7 100644
--- a/packages/frontend/src/components/MkSubNoteContent.vue
+++ b/packages/frontend/src/components/MkSubNoteContent.vue
@@ -65,7 +65,7 @@ const collapsed = ref(isLong);
 			left: 0;
 			width: 100%;
 			height: 64px;
-			background: linear-gradient(0deg, var(--panel), var(--X15));
+			background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 
 			> .fadeLabel {
 				display: inline-block;
diff --git a/packages/frontend/src/components/global/MkAvatar.vue b/packages/frontend/src/components/global/MkAvatar.vue
index e8e1bc696b..ee224dba49 100644
--- a/packages/frontend/src/components/global/MkAvatar.vue
+++ b/packages/frontend/src/components/global/MkAvatar.vue
@@ -26,7 +26,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<template v-if="showDecoration">
 		<img
 			v-for="decoration in decorations ?? user.avatarDecorations"
-			:class="[$style.decoration]"
+			:class="[$style.decoration, { [$style.decorationBlink]: decoration.blink }]"
 			:src="getDecorationUrl(decoration)"
 			:style="{
 				rotate: getDecorationAngle(decoration),
@@ -60,7 +60,7 @@ const props = withDefaults(defineProps<{
 	link?: boolean;
 	preview?: boolean;
 	indicator?: boolean;
-	decorations?: Omit<Misskey.entities.UserDetailed['avatarDecorations'][number], 'id'>[];
+	decorations?: (Omit<Misskey.entities.UserDetailed['avatarDecorations'][number], 'id'> & { blink?: boolean; })[];
 	forceShowDecoration?: boolean;
 }>(), {
 	target: null,
@@ -330,4 +330,17 @@ watch(() => props.user.avatarBlurhash, () => {
 	width: 200%;
 	pointer-events: none;
 }
+
+.decorationBlink {
+	animation: blink 1s infinite;
+}
+
+@keyframes blink {
+	0%, 100% {
+		filter: brightness(2);
+	}
+	50% {
+		filter: brightness(1);
+	}
+}
 </style>
diff --git a/packages/frontend/src/pages/admin/abuses.vue b/packages/frontend/src/pages/admin/abuses.vue
index 9a9fa472a5..0b9847fed3 100644
--- a/packages/frontend/src/pages/admin/abuses.vue
+++ b/packages/frontend/src/pages/admin/abuses.vue
@@ -9,7 +9,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 	<MkSpacer :contentMax="900">
 		<div :class="$style.root" class="_gaps">
 			<div :class="$style.subMenus" class="_gaps">
-				<MkButton link to="/admin/abuse-report-notification-recipient" primary>{{ "通知設定" }}</MkButton>
+				<MkButton link to="/admin/abuse-report-notification-recipient" primary>{{ i18n.ts.notificationSetting }}</MkButton>
 			</div>
 
 			<div :class="$style.inputs" class="_gaps">
diff --git a/packages/frontend/src/pages/channel.vue b/packages/frontend/src/pages/channel.vue
index 3c3ff08aee..7e7b724023 100644
--- a/packages/frontend/src/pages/channel.vue
+++ b/packages/frontend/src/pages/channel.vue
@@ -310,7 +310,7 @@ definePageMetadata(() => ({
 	left: 0;
 	width: 100%;
 	height: 64px;
-	background: linear-gradient(0deg, var(--panel), var(--X15));
+	background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 }
 
 .bannerStatus {
diff --git a/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue b/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
index ce1d4e48d8..1938b8d48d 100644
--- a/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
+++ b/packages/frontend/src/pages/settings/avatar-decoration.dialog.vue
@@ -96,6 +96,7 @@ const decorationsForPreview = computed(() => {
 		flipH: flipH.value,
 		offsetX: offsetX.value,
 		offsetY: offsetY.value,
+		blink: true,
 	};
 	const decorations = [...$i.avatarDecorations];
 	if (props.usingIndex != null) {
diff --git a/packages/frontend/src/pages/welcome.timeline.note.vue b/packages/frontend/src/pages/welcome.timeline.note.vue
index f385938343..6a9ecd9a62 100644
--- a/packages/frontend/src/pages/welcome.timeline.note.vue
+++ b/packages/frontend/src/pages/welcome.timeline.note.vue
@@ -84,7 +84,7 @@ onUpdated(() => {
 		left: 0;
 		width: 100%;
 		height: 64px;
-		background: linear-gradient(0deg, var(--panel), var(--X15));
+		background: linear-gradient(0deg, var(--panel), color(from var(--panel) srgb r g b / 0));
 	}
 }
 
diff --git a/packages/frontend/src/style.scss b/packages/frontend/src/style.scss
index df2532f812..400fb0c552 100644
--- a/packages/frontend/src/style.scss
+++ b/packages/frontend/src/style.scss
@@ -257,11 +257,11 @@ rt {
 	background: var(--accent);
 
 	&:not(:disabled):hover {
-		background: var(--X8);
+		background: hsl(from var(--accent) h s calc(l + 5));
 	}
 
 	&:not(:disabled):active {
-		background: var(--X9);
+		background: hsl(from var(--accent) h s calc(l - 5));
 	}
 }
 
@@ -271,11 +271,11 @@ rt {
 	background: linear-gradient(90deg, var(--buttonGradateA), var(--buttonGradateB));
 
 	&:not(:disabled):hover {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 
 	&:not(:disabled):active {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 }
 
diff --git a/packages/frontend/src/themes/_dark.json5 b/packages/frontend/src/themes/_dark.json5
index c82a956868..17fb98e4ee 100644
--- a/packages/frontend/src/themes/_dark.json5
+++ b/packages/frontend/src/themes/_dark.json5
@@ -77,22 +77,14 @@
 		codeBoolean: '#c59eff',
 		deckBg: '#000',
 		htmlThemeColor: '@bg',
-		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',
-		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',
 	},
 
 	codeHighlighter: {
diff --git a/packages/frontend/src/themes/_light.json5 b/packages/frontend/src/themes/_light.json5
index 63bc030916..ca6c059e16 100644
--- a/packages/frontend/src/themes/_light.json5
+++ b/packages/frontend/src/themes/_light.json5
@@ -77,22 +77,14 @@
 		codeBoolean: '#62b70c',
 		deckBg: ':darken<3<@bg',
 		htmlThemeColor: '@bg',
-		X2: ':darken<2<@panel',
 		X3: 'rgba(0, 0, 0, 0.05)',
 		X4: 'rgba(0, 0, 0, 0.1)',
 		X5: 'rgba(0, 0, 0, 0.05)',
 		X6: 'rgba(0, 0, 0, 0.25)',
 		X7: 'rgba(0, 0, 0, 0.05)',
-		X8: ':lighten<5<@accent',
-		X9: ':darken<5<@accent',
-		X10: ':alpha<0.4<@accent',
 		X11: 'rgba(0, 0, 0, 0.1)',
 		X12: 'rgba(0, 0, 0, 0.1)',
 		X13: 'rgba(0, 0, 0, 0.15)',
-		X14: ':alpha<0.5<@navBg',
-		X15: ':alpha<0<@panel',
-		X16: ':alpha<0.7<@panel',
-		X17: ':alpha<0.8<@bg',
 	},
 
 	codeHighlighter: {
diff --git a/packages/frontend/src/themes/d-astro.json5 b/packages/frontend/src/themes/d-astro.json5
index fee25cc4a4..1cbb4e519d 100644
--- a/packages/frontend/src/themes/d-astro.json5
+++ b/packages/frontend/src/themes/d-astro.json5
@@ -57,20 +57,13 @@
 		wallpaperOverlay: 'rgba(0, 0, 0, 0.5)',
 		panelHeaderDivider: 'rgba(0, 0, 0, 0)',
 		scrollbarHandleHover: 'rgba(255, 255, 255, 0.4)',
-		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',
-		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',
 	},
 }
diff --git a/packages/frontend/src/themes/d-u0.json5 b/packages/frontend/src/themes/d-u0.json5
index 3bd0b9483c..c8a31bb1a7 100644
--- a/packages/frontend/src/themes/d-u0.json5
+++ b/packages/frontend/src/themes/d-u0.json5
@@ -3,14 +3,11 @@
 	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',
diff --git a/packages/frontend/src/themes/l-u0.json5 b/packages/frontend/src/themes/l-u0.json5
index dbc777d493..0b952b003a 100644
--- a/packages/frontend/src/themes/l-u0.json5
+++ b/packages/frontend/src/themes/l-u0.json5
@@ -3,14 +3,11 @@
 	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',
diff --git a/packages/frontend/src/themes/l-vivid.json5 b/packages/frontend/src/themes/l-vivid.json5
index 3368855b5e..3da2ca28fb 100644
--- a/packages/frontend/src/themes/l-vivid.json5
+++ b/packages/frontend/src/themes/l-vivid.json5
@@ -60,21 +60,13 @@
 		fgTransparentWeak: ':alpha<0.75<@fg',
 		panelHeaderDivider: '@divider',
 		scrollbarHandleHover: 'rgba(0, 0, 0, 0.4)',
-		X2: ':darken<2<@panel',
 		X3: 'rgba(0, 0, 0, 0.05)',
 		X4: 'rgba(0, 0, 0, 0.1)',
 		X5: 'rgba(0, 0, 0, 0.05)',
 		X6: 'rgba(0, 0, 0, 0.25)',
 		X7: 'rgba(0, 0, 0, 0.05)',
-		X8: ':lighten<5<@accent',
-		X9: ':darken<5<@accent',
-		X10: ':alpha<0.4<@accent',
 		X11: 'rgba(0, 0, 0, 0.1)',
 		X12: 'rgba(0, 0, 0, 0.1)',
 		X13: 'rgba(0, 0, 0, 0.15)',
-		X14: ':alpha<0.5<@navBg',
-		X15: ':alpha<0<@panel',
-		X16: ':alpha<0.7<@panel',
-		X17: ':alpha<0.8<@bg',
 	},
 }
diff --git a/packages/frontend/src/ui/_common_/navbar-for-mobile.vue b/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
index 87e9e45e63..e80d5fd399 100644
--- a/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
+++ b/packages/frontend/src/ui/_common_/navbar-for-mobile.vue
@@ -82,6 +82,8 @@ function more() {
 
 <style lang="scss" module>
 .root {
+	--nav-bg-transparent: color-mix(in srgb, var(--navBg), transparent 50%);
+
 	display: flex;
 	flex-direction: column;
 }
@@ -91,7 +93,7 @@ function more() {
 	top: 0;
 	z-index: 1;
 	padding: 20px 0;
-	background: var(--X14);
+	background: var(--nav-bg-transparent);
 	-webkit-backdrop-filter: var(--blur, blur(8px));
 	backdrop-filter: var(--blur, blur(8px));
 }
@@ -125,7 +127,7 @@ function more() {
 	position: sticky;
 	bottom: 0;
 	padding: 20px 0;
-	background: var(--X14);
+	background: var(--nav-bg-transparent);
 	-webkit-backdrop-filter: var(--blur, blur(8px));
 	backdrop-filter: var(--blur, blur(8px));
 }
diff --git a/packages/frontend/src/ui/_common_/navbar.vue b/packages/frontend/src/ui/_common_/navbar.vue
index 8307da0d42..2b116909ba 100644
--- a/packages/frontend/src/ui/_common_/navbar.vue
+++ b/packages/frontend/src/ui/_common_/navbar.vue
@@ -111,6 +111,7 @@ function more(ev: MouseEvent) {
 .root {
 	--nav-width: 250px;
 	--nav-icon-only-width: 80px;
+	--nav-bg-transparent: color-mix(in srgb, var(--navBg), transparent 50%);
 
 	flex: 0 0 var(--nav-width);
 	width: var(--nav-width);
@@ -144,7 +145,7 @@ function more(ev: MouseEvent) {
 		top: 0;
 		z-index: 1;
 		padding: 20px 0;
-		background: var(--X14);
+		background: var(--nav-bg-transparent);
 		-webkit-backdrop-filter: var(--blur, blur(8px));
 		backdrop-filter: var(--blur, blur(8px));
 	}
@@ -187,7 +188,7 @@ function more(ev: MouseEvent) {
 		position: sticky;
 		bottom: 0;
 		padding-top: 20px;
-		background: var(--X14);
+		background: var(--nav-bg-transparent);
 		-webkit-backdrop-filter: var(--blur, blur(8px));
 		backdrop-filter: var(--blur, blur(8px));
 	}
@@ -378,7 +379,7 @@ function more(ev: MouseEvent) {
 		top: 0;
 		z-index: 1;
 		padding: 20px 0;
-		background: var(--X14);
+		background: var(--nav-bg-transparent);
 		-webkit-backdrop-filter: var(--blur, blur(8px));
 		backdrop-filter: var(--blur, blur(8px));
 	}
@@ -408,7 +409,7 @@ function more(ev: MouseEvent) {
 		position: sticky;
 		bottom: 0;
 		padding-top: 20px;
-		background: var(--X14);
+		background: var(--nav-bg-transparent);
 		-webkit-backdrop-filter: var(--blur, blur(8px));
 		backdrop-filter: var(--blur, blur(8px));
 	}
diff --git a/packages/frontend/src/ui/deck.vue b/packages/frontend/src/ui/deck.vue
index 7416931bda..6038792ba0 100644
--- a/packages/frontend/src/ui/deck.vue
+++ b/packages/frontend/src/ui/deck.vue
@@ -451,7 +451,7 @@ body {
 	}
 
 	&:active {
-		background: var(--X2);
+		background: hsl(from var(--panel) h s calc(l - 2));
 	}
 }
 
@@ -461,11 +461,11 @@ body {
 	color: var(--fgOnAccent);
 
 	&:hover {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 
 	&:active {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 }
 
diff --git a/packages/frontend/src/ui/universal.vue b/packages/frontend/src/ui/universal.vue
index 4fae90e124..9f61b5c720 100644
--- a/packages/frontend/src/ui/universal.vue
+++ b/packages/frontend/src/ui/universal.vue
@@ -424,7 +424,7 @@ $widgets-hide-threshold: 1090px;
 	}
 
 	&:active {
-		background: var(--X2);
+		background: hsl(from var(--panel) h s calc(l - 2));
 	}
 }
 
@@ -434,11 +434,11 @@ $widgets-hide-threshold: 1090px;
 	color: var(--fgOnAccent);
 
 	&:hover {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 
 	&:active {
-		background: linear-gradient(90deg, var(--X8), var(--X8));
+		background: linear-gradient(90deg, hsl(from var(--accent) h s calc(l + 5)), hsl(from var(--accent) h s calc(l + 5)));
 	}
 }