diff --git a/agaric/sass/agaric/_component.tabs.scss b/agaric/sass/agaric/_component.tabs.scss
index d416654..766c944 100644
--- a/agaric/sass/agaric/_component.tabs.scss
+++ b/agaric/sass/agaric/_component.tabs.scss
@@ -28,4 +28,5 @@
   top: 250px;
   left: 0.75rem;
   z-index: 1;
+  background: rgba(255, 255, 255, 0.75);
 }