diff --git a/styleguide.css b/styleguide.css
index 5d51815..6d4178b 100644
--- a/styleguide.css
+++ b/styleguide.css
@@ -2240,6 +2240,7 @@ section + section {
   flex-direction: column;
   gap: var(--spacing-small);
   width: 100%;
+  --surface-tab-unselected: var(--color-light-grey);
 }
 
 .sg-content-block-card-group__tabs,