diff --git a/site/assets/scss/_subnav.scss b/site/assets/scss/_subnav.scss
index 5b4d2806f91a..19ee4d2389b7 100644
--- a/site/assets/scss/_subnav.scss
+++ b/site/assets/scss/_subnav.scss
@@ -41,4 +41,8 @@
 .bd-search-docs-toggle {
   line-height: 1;
   color: $gray-900;
+
+  &:focus {
+    border: 3px solid $purple-100;
+  }
 }