diff --git a/css/index.css b/css/index.css
index ca429b6..c725e3f 100644
--- a/css/index.css
+++ b/css/index.css
@@ -159,7 +159,7 @@ main :first-child {
 }
 
 header {
-	border-bottom: 2px dashed var(--color-gray-20);
+	border-bottom: 2px dashed var(--color-gray-90);
 }
 
 #skip-link {