diff --git a/src/components/data-table/ha-data-table.ts b/src/components/data-table/ha-data-table.ts
index fa1a0e449d87..453d8707e6fa 100644
--- a/src/components/data-table/ha-data-table.ts
+++ b/src/components/data-table/ha-data-table.ts
@@ -1200,6 +1200,7 @@ export class HaDataTable extends LitElement {
           display: flex;
           align-items: center;
           cursor: pointer;
+          background-color: var(--primary-background-color);
         }
 
         .group-header ha-icon-button {