diff --git a/src/components/GroupedList/GroupHeader.scss b/src/components/GroupedList/GroupHeader.scss
index 1fee24770ab0b..c737b61386433 100644
--- a/src/components/GroupedList/GroupHeader.scss
+++ b/src/components/GroupedList/GroupHeader.scss
@@ -54,6 +54,7 @@
 .ms-GroupHeader-expand {
   width: 36px;
   height: 40px;
+  color: $ms-color-neutralSecondary;
 
   .ms-Icon {
     transform: rotate(-180deg);