diff --git a/playground/app.config.ts b/playground/app.config.ts
new file mode 100644
index 00000000..da83d005
--- /dev/null
+++ b/playground/app.config.ts
@@ -0,0 +1,6 @@
+export default defineAppConfig({
+  ui: {
+    primary: 'green',
+    gray: 'cool'
+  }
+})