Ticket #48598: 48598.3.diff

src/wp-admin/css/colors/_admin.scss

@@ -91 +91 @@
         .button.focus,
         .button:focus {
                 border-color: $highlight-color;
+                color: darken( #32373c, 5% );
                 box-shadow: 0 0 0 1px $highlight-color;
         }
 

src/wp-admin/css/colors/_mixins.scss

@@ -2 +2 @@
  * Button mixin- creates a button effect with correct
  * highlights/shadows, based on a base color.
  */
-@mixin button( $button-color, $text-color: #fff ) {
+@mixin button( $button-color, $button-text-color: #fff ) {
         background: $button-color;
         border-color: $button-color;
         color: $button-text-color;