diff --git a/packages/editor/src/components/collapsible-block-toolbar/style.scss b/packages/editor/src/components/collapsible-block-toolbar/style.scss
index 80d25da1a3e28e..18fdc556681449 100644
--- a/packages/editor/src/components/collapsible-block-toolbar/style.scss
+++ b/packages/editor/src/components/collapsible-block-toolbar/style.scss
@@ -7,6 +7,7 @@
 	.block-editor-block-contextual-toolbar {
 		border-bottom: 0;
 		height: 100%;
+		background: transparent;
 	}
 
 	// These rules ensure that icons are always positioned in a way that lines up with the rest of the icons in the toolbar.