diff --git a/frontend/tests/e2e/theme-colors.spec.ts b/frontend/tests/e2e/theme-colors.spec.ts
index e5bd0b62..20624c9a 100644
--- a/frontend/tests/e2e/theme-colors.spec.ts
+++ b/frontend/tests/e2e/theme-colors.spec.ts
@@ -14,19 +14,6 @@ function isTransparent(color: string) {
   return normalized === "transparent" || normalized.endsWith(",0)");
 }
 
-function parseRgb(color: string) {
-  const colorRegex =
-    /rgba?\(\s*([0-9.]+)\s*,\s*([0-9.]+)\s*,\s*([0-9.]+)(?:\s*,\s*([0-9.]+))?\s*\)/i;
-  const match = colorRegex.exec(color);
-  if (!match) return null;
-  return {
-    r: Number(match[1]),
-    g: Number(match[2]),
-    b: Number(match[3]),
-    a: match[4] == null ? 1 : Number(match[4]),
-  };
-}
-
 test.describe("聊天工作台 / 主题颜色回归", () => {
   test("DF-THEME-001 thread 页面在 light/dark 根容器颜色不同且非透明", async ({
     page,