diff --git a/src/coll.js b/src/coll.js
index 3f2a8b4..133a72e 100644
--- a/src/coll.js
+++ b/src/coll.js
@@ -476,6 +476,7 @@ class Coll extends LitElement
       flex-direction: column;
       min-height: 0px;
       flex: auto;
+      background-color: white;
     }
 
     #tabContents {
diff --git a/ui.js b/ui.js
index a1f6eed..f92d7b3 100644
--- a/ui.js
+++ b/ui.js
@@ -998,6 +998,7 @@ class se extends oe{}se.directiveName="unsafeSVG",se.resultType=2;const le=ae(se
       flex-direction: column;
       min-height: 0px;
       flex: auto;
+      background-color: white;
     }
 
     #tabContents {