diff --git a/docs/stylesheets/extra.css b/docs/stylesheets/extra.css
index 1ed807f8..e4574103 100644
--- a/docs/stylesheets/extra.css
+++ b/docs/stylesheets/extra.css
@@ -16,13 +16,11 @@ p:has(span.breadcrumb) {
 /* Keep the experimental status announcement prominent across the docs site. */
 .md-banner {
   background-color: #ffe0a3;
-  border-bottom: 1px solid #d98b00;
   color: #291b00;
 }
 
 [data-md-color-scheme="slate"] .md-banner {
   background-color: #332407;
-  border-bottom-color: #8f650b;
   color: #fff4d6;
 }