diff --git a/src/wp-admin/css/common.css b/src/wp-admin/css/common.css
index 5f9022ebf5..cb20858db4 100644
--- a/src/wp-admin/css/common.css
+++ b/src/wp-admin/css/common.css
@@ -3030,11 +3030,17 @@ div.action-links {
 
 .plugin-details-modal #TB_closeWindowButton:hover,
 .plugin-details-modal #TB_closeWindowButton:focus {
-	color: #135e96;
 	outline: none;
 	box-shadow: none;
 }
 
+.plugin-details-modal #TB_closeWindowButton:hover::after,
+.plugin-details-modal #TB_closeWindowButton:focus::after {
+	outline: 2px solid;
+	outline-offset: -4px;
+	border-radius: 4px;
+}
+
 .plugin-details-modal .tb-close-icon {
 	display: none;
 }