diff --git a/npm/ng-packs/packages/theme-basic/src/lib/constants/styles.ts b/npm/ng-packs/packages/theme-basic/src/lib/constants/styles.ts
index cacf326031..be67bece5a 100644
--- a/npm/ng-packs/packages/theme-basic/src/lib/constants/styles.ts
+++ b/npm/ng-packs/packages/theme-basic/src/lib/constants/styles.ts
@@ -68,4 +68,9 @@ export default `
 .ui-table .ui-table-tbody > tr.empty-row > div.empty-row-content {
     border: 1px solid #c8c8c8;
   }
+
+.modal-backdrop {
+background-color: rgba(0, 0, 0, 0.6);
+}
+
 `;