diff --git a/packages/editor/src/components/collab-sidebar/style.scss b/packages/editor/src/components/collab-sidebar/style.scss
index 2f937e3df9a25b..dba2ea397cb6c6 100644
--- a/packages/editor/src/components/collab-sidebar/style.scss
+++ b/packages/editor/src/components/collab-sidebar/style.scss
@@ -1,5 +1,15 @@
+.interface-interface-skeleton__sidebar:has(.editor-collab-sidebar-panel) {
+	box-shadow: none;
+
+	.interface-complementary-area-header {
+		display: none;
+	}
+}
+
 .editor-collab-sidebar-panel {
 	padding: $grid-unit-20;
+	background: var(--wp--preset--color--base);
+	height: 100vw;
 
 	&__thread {
 		position: relative;