Index: src/wp-includes/css/buttons.css
===================================================================
--- src/wp-includes/css/buttons.css	(revision 52142)
+++ src/wp-includes/css/buttons.css	(working copy)
@@ -252,8 +252,8 @@
 .wp-core-ui .button-primary:hover,
 .wp-core-ui .button-primary.focus,
 .wp-core-ui .button-primary:focus {
-	background: #135e96;
-	border-color: #135e96;
+	background: #0a4b78;
+	border-color: #0a4b78;
 	color: #fff;
 }