1 files changed, 18 insertions, 0 deletions
diff --git a/packages/frontend/src/scripts/get-bg-color.ts b/packages/frontend/src/scripts/get-bg-color.ts
new file mode 100644
index 0000000000..ccf60b454f
--- /dev/null
+++ b/packages/frontend/src/scripts/get-bg-color.ts
@@ -0,0 +1,18 @@
+/*
+ * SPDX-FileCopyrightText: syuilo and misskey-project
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+import tinycolor from 'tinycolor2';
+
+export const getBgColor = (elem?: Element | null | undefined): string | null => {
+	if (elem == null) return null;
+
+	const { backgroundColor: bg } = window.getComputedStyle(elem);
+
+	if (bg && tinycolor(bg).getAlpha() !== 0) {
+		return bg;
+	}
+
+	return getBgColor(elem.parentElement);
+};