diff --git a/api/@internal/component/ets/inspector.d.ts b/api/@internal/component/ets/inspector.d.ts
index 0af83efaff30e8c89a16c72596dc3f447b7f2b38..7dc106a2babd474a9523768f66be526a935ef3bb 100644
--- a/api/@internal/component/ets/inspector.d.ts
+++ b/api/@internal/component/ets/inspector.d.ts
@@ -101,3 +101,11 @@ declare namespace Profiler {
    */
   function unregisterVsyncCallback(): void;
 }
+
+/**
+ * Set app background color.
+ * @since 8
+ * @systemapi
+ * @test
+ */
+declare function setAppBgColor(value: string): void;