Index: src/wp-admin/css/forms.css
===================================================================
--- src/wp-admin/css/forms.css	(revision 50237)
+++ src/wp-admin/css/forms.css	(working copy)
@@ -704,9 +704,11 @@
 }
 
 /* Colors for the tags autocomplete. */
-.wp-tags-autocomplete .ui-state-focus {
+.wp-tags-autocomplete .ui-state-focus,
+.wp-tags-autocomplete [aria-selected="true"] {
 	background-color: #2271b1;
 	color: #fff;
+	outline: 2px solid transparent;
 }
 
 /*------------------------------------------------------------------------------