diff --git a/projects/aca-content/src/lib/ui/overrides/ay11.scss b/projects/aca-content/src/lib/ui/overrides/ay11.scss
index 985ec1b41c..4dad10e426 100644
--- a/projects/aca-content/src/lib/ui/overrides/ay11.scss
+++ b/projects/aca-content/src/lib/ui/overrides/ay11.scss
@@ -44,7 +44,7 @@
   }
 
   .mat-mdc-form-field-focus-overlay {
-    background-color: transparent;
+    --mat-form-field-state-layer-color: transparent;
   }
 
   .mdc-menu-surface.mat-mdc-autocomplete-panel:is(div),