diff --git a/packages/frontend-embed/src/components/EmMediaImage.vue b/packages/frontend-embed/src/components/EmMediaImage.vue
index fe1aa5a87..470352469 100644
--- a/packages/frontend-embed/src/components/EmMediaImage.vue
+++ b/packages/frontend-embed/src/components/EmMediaImage.vue
@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div :class="[hide ? $style.hidden : $style.visible]" :style="darkMode ? '--c: rgb(255 255 255 / 2%);' : '--c: rgb(0 0 0 / 2%);'" @click="onclick">
+<div :class="[hide ? $style.hidden : $style.visible]" @click="onclick">
 	<a
 		:title="image.name"
 		:class="$style.imageContainer"
@@ -58,7 +58,6 @@ const props = withDefaults(defineProps<{
 });
 
 const hide = ref(props.image.isSensitive);
-const darkMode = ref<boolean>(false); // TODO
 
 const url = computed(() => (props.raw)
 	? props.image.url
@@ -117,10 +116,19 @@ async function onclick(ev: MouseEvent) {
 	position: relative;
 	//box-shadow: 0 0 0 1px var(--divider) inset;
 	background: var(--bg);
-	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
 	background-size: 16px 16px;
 }
 
+html[data-color-scheme=dark] .visible {
+	--c: rgb(255 255 255 / 2%);
+	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
+}
+
+html[data-color-scheme=light] .visible {
+	--c: rgb(0 0 0 / 2%);
+	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
+}
+
 .imageContainer {
 	display: block;
 	overflow: hidden;
diff --git a/packages/frontend-embed/src/theme.ts b/packages/frontend-embed/src/theme.ts
index ee633fae9..23e70cd0d 100644
--- a/packages/frontend-embed/src/theme.ts
+++ b/packages/frontend-embed/src/theme.ts
@@ -39,6 +39,10 @@ export function applyTheme(theme: Theme, persist = true) {
 		document.documentElement.classList.remove('_themeChanging_');
 	}, 1000);
 
+	const colorScheme = theme.base === 'dark' ? 'dark' : 'light';
+
+	document.documentElement.dataset.colorScheme = colorScheme;
+
 	// Deep copy
 	const _theme = JSON.parse(JSON.stringify(theme));
 
diff --git a/packages/frontend/src/boot/common.ts b/packages/frontend/src/boot/common.ts
index 287788bc8..af05f657c 100644
--- a/packages/frontend/src/boot/common.ts
+++ b/packages/frontend/src/boot/common.ts
@@ -5,10 +5,10 @@
 
 import { computed, watch, version as vueVersion, App } from 'vue';
 import { compareVersions } from 'compare-versions';
+import { version, lang, updateLocale, locale } from '@@/js/config.js';
 import widgets from '@/widgets/index.js';
 import directives from '@/directives/index.js';
 import components from '@/components/index.js';
-import { version, lang, updateLocale, locale } from '@@/js/config.js';
 import { applyTheme } from '@/scripts/theme.js';
 import { isDeviceDarkmode } from '@/scripts/is-device-darkmode.js';
 import { updateI18n } from '@/i18n.js';
@@ -146,10 +146,9 @@ export async function common(createVue: () => App<Element>) {
 	// NOTE: この処理は必ずクライアント更新チェック処理より後に来ること(テーマ再構築のため)
 	watch(defaultStore.reactiveState.darkMode, (darkMode) => {
 		applyTheme(darkMode ? ColdDeviceStorage.get('darkTheme') : ColdDeviceStorage.get('lightTheme'));
-		document.documentElement.dataset.colorMode = darkMode ? 'dark' : 'light';
 	}, { immediate: miLocalStorage.getItem('theme') == null });
 
-	document.documentElement.dataset.colorMode = defaultStore.state.darkMode ? 'dark' : 'light';
+	document.documentElement.dataset.colorScheme = defaultStore.state.darkMode ? 'dark' : 'light';
 
 	const darkTheme = computed(ColdDeviceStorage.makeGetterSetter('darkTheme'));
 	const lightTheme = computed(ColdDeviceStorage.makeGetterSetter('lightTheme'));
diff --git a/packages/frontend/src/components/MkMediaImage.vue b/packages/frontend/src/components/MkMediaImage.vue
index 91e90ec99..0c5c8fd9d 100644
--- a/packages/frontend/src/components/MkMediaImage.vue
+++ b/packages/frontend/src/components/MkMediaImage.vue
@@ -4,7 +4,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 -->
 
 <template>
-<div :class="[hide ? $style.hidden : $style.visible, (image.isSensitive && defaultStore.state.highlightSensitiveMedia) && $style.sensitive]" :style="darkMode ? '--c: rgb(255 255 255 / 2%);' : '--c: rgb(0 0 0 / 2%);'" @click="onclick">
+<div :class="[hide ? $style.hidden : $style.visible, (image.isSensitive && defaultStore.state.highlightSensitiveMedia) && $style.sensitive]" @click="onclick">
 	<component
 		:is="disableImageLink ? 'div' : 'a'"
 		v-bind="disableImageLink ? {
@@ -53,6 +53,7 @@ SPDX-License-Identifier: AGPL-3.0-only
 <script lang="ts" setup>
 import { watch, ref, computed } from 'vue';
 import * as Misskey from 'misskey-js';
+import type { MenuItem } from '@/types/menu.js';
 import { getStaticImageUrl } from '@/scripts/media-proxy.js';
 import bytes from '@/filters/bytes.js';
 import ImgWithBlurhash from '@/components/MkImgWithBlurhash.vue';
@@ -60,7 +61,6 @@ import { defaultStore } from '@/store.js';
 import { i18n } from '@/i18n.js';
 import * as os from '@/os.js';
 import { $i, iAmModerator } from '@/account.js';
-import type { MenuItem } from '@/types/menu.js';
 
 const props = withDefaults(defineProps<{
 	image: Misskey.entities.DriveFile;
@@ -75,7 +75,6 @@ const props = withDefaults(defineProps<{
 });
 
 const hide = ref(true);
-const darkMode = ref<boolean>(defaultStore.state.darkMode);
 
 const url = computed(() => (props.raw || defaultStore.state.loadRawImages)
 	? props.image.url
@@ -209,10 +208,19 @@ function showMenu(ev: MouseEvent) {
 	position: relative;
 	//box-shadow: 0 0 0 1px var(--divider) inset;
 	background: var(--bg);
-	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
 	background-size: 16px 16px;
 }
 
+html[data-color-scheme=dark] .visible {
+	--c: rgb(255 255 255 / 2%);
+	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
+}
+
+html[data-color-scheme=light] .visible {
+	--c: rgb(0 0 0 / 2%);
+	background-image: linear-gradient(45deg, var(--c) 16.67%, var(--bg) 16.67%, var(--bg) 50%, var(--c) 50%, var(--c) 66.67%, var(--bg) 66.67%, var(--bg) 100%);
+}
+
 .menu {
 	display: block;
 	position: absolute;
diff --git a/packages/frontend/src/components/MkPostForm.vue b/packages/frontend/src/components/MkPostForm.vue
index 039393887..d2d764f5a 100644
--- a/packages/frontend/src/components/MkPostForm.vue
+++ b/packages/frontend/src/components/MkPostForm.vue
@@ -105,11 +105,11 @@ import * as mfm from 'mfm-js';
 import * as Misskey from 'misskey-js';
 import insertTextAtCursor from 'insert-text-at-cursor';
 import { toASCII } from 'punycode/';
+import { host, url } from '@@/js/config.js';
 import MkNoteSimple from '@/components/MkNoteSimple.vue';
 import MkNotePreview from '@/components/MkNotePreview.vue';
 import XPostFormAttaches from '@/components/MkPostFormAttaches.vue';
 import MkPollEditor, { type PollEditorModelValue } from '@/components/MkPollEditor.vue';
-import { host, url } from '@@/js/config.js';
 import { erase, unique } from '@/scripts/array.js';
 import { extractMentions } from '@/scripts/extract-mentions.js';
 import { formatTimeString } from '@/scripts/format-time-string.js';
@@ -1201,6 +1201,15 @@ defineExpose({
 	min-height: 75px;
 	max-height: 150px;
 	overflow: auto;
+	background-size: auto auto;
+}
+
+html[data-color-scheme=dark] .preview {
+	background-image: repeating-linear-gradient(135deg, transparent, transparent 5px, #0005 5px, #0005 10px);
+}
+
+html[data-color-scheme=light] .preview {
+	background-image: repeating-linear-gradient(135deg, transparent, transparent 5px, #0001 5px, #0001 10px);
 }
 
 .targetNote {
diff --git a/packages/frontend/src/scripts/theme.ts b/packages/frontend/src/scripts/theme.ts
index fc888c090..b7e7a5a3f 100644
--- a/packages/frontend/src/scripts/theme.ts
+++ b/packages/frontend/src/scripts/theme.ts
@@ -74,6 +74,8 @@ export function applyTheme(theme: Theme, persist = true) {
 
 	const colorScheme = theme.base === 'dark' ? 'dark' : 'light';
 
+	document.documentElement.dataset.colorScheme = colorScheme;
+
 	// Deep copy
 	const _theme = deepClone(theme);
 
diff --git a/packages/frontend/src/style.scss b/packages/frontend/src/style.scss
index 5e1944712..28a16fd6d 100644
--- a/packages/frontend/src/style.scss
+++ b/packages/frontend/src/style.scss
@@ -457,7 +457,7 @@ rt {
 	--fg: #693410;
 }
 
-html[data-color-mode=dark] ._woodenFrame {
+html[data-color-scheme=dark] ._woodenFrame {
 	--bg: #1d0c02;
 	--fg: #F1E8DC;
 	--panel: #192320;