diff --git a/app/javascript/mastodon/features/ui/components/media_modal.tsx b/app/javascript/mastodon/features/ui/components/media_modal.tsx
index c9ae5638e0c..5b864ff70d7 100644
--- a/app/javascript/mastodon/features/ui/components/media_modal.tsx
+++ b/app/javascript/mastodon/features/ui/components/media_modal.tsx
@@ -116,6 +116,9 @@ export const MediaModal: FC<MediaModalProps> = forwardRef<
           onChangeBackgroundColor(backgroundColor);
         }
       }
+      return () => {
+        onChangeBackgroundColor(null);
+      };
     }, [currentMedia, onChangeBackgroundColor]);
 
     const [viewportDimensions, setViewportDimensions] = useState<{