Ticket #28267: 28267.primary-button-colorschemes.diff

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

@@ -13 +13 @@
                 background: darken( $button-color, 5% );
                 border-color: darken( $button-color, 15% );
                 color: $text-color;
-                box-shadow: inset 0 1px 0 lighten( $button-color, 10% ), 0 1px 0 rgba(0,0,0,.15);
+                box-shadow: inset 0 1px 0 lighten( $button-color, 10% ),
         }
 
+        &:focus {
+                box-shadow: inset 0 1px 0 lighten( $button-color, 10% ),
+                            0 0 0 1px #5b9dd9,
+                            0 0 2px 1px rgba( 30, 140, 190, .8 );
+        }
+
         &:active {
                 background: darken( $button-color, 10% );
                 border-color: darken( $button-color, 15% );
                 color: $text-color;
-                box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 );
+                box-shadow: inset 0 2px 5px -3px rgba( 0, 0, 0, 0.5 ),
+                            0 0 0 1px #5b9dd9,
+                            0 0 2px 1px rgba( 30, 140, 190, .8 );
         }
 
         &[disabled],