diff --git a/tensorboard/plugins/projector/vz_projector/vz-projector.html.ts b/tensorboard/plugins/projector/vz_projector/vz-projector.html.ts
index ff5c4e04f0..382fb52f6c 100644
--- a/tensorboard/plugins/projector/vz_projector/vz-projector.html.ts
+++ b/tensorboard/plugins/projector/vz_projector/vz-projector.html.ts
@@ -219,6 +219,7 @@ export const template = html`
         position: absolute;
         top: 20px;
         left: 20px;
+        background: white;
       }
 
       #help3dDialog .main {