diff --git a/src/components/navigation-header/navigation-header.module.css b/src/components/navigation-header/navigation-header.module.css
index f6c8c8b551..e6c51659d7 100644
--- a/src/components/navigation-header/navigation-header.module.css
+++ b/src/components/navigation-header/navigation-header.module.css
@@ -107,7 +107,8 @@
 	background-color: transparent;
 	color: var(--token-color-foreground-high-contrast);
 
-	&:hover {
+	&:hover,
+	&[aria-expanded='true'] {
 		border-color: var(--token-color-palette-neutral-200);
 	}
 
@@ -120,7 +121,7 @@
 	@nest html[data-theme='dark'] & {
 		color: var(--token-color-foreground-strong);
 
-		&:hover {
+		&:hover, &[aria-expanded='true'] {
 			border-color: var(--token-color-border-strong);
 		}
 	}