diff --git a/demo/playground/index.html b/demo/playground/index.html
index d322ee3e..26b1cae5 100644
--- a/demo/playground/index.html
+++ b/demo/playground/index.html
@@ -14,6 +14,12 @@
redoc {
display: block;
}
+
+ label[role=menuitem][type=group] {
+ color: orange;
+ font-weight: bolder;
+ font-size: 120%;
+ }