Ticket #30964: 30964.diff

src/wp-admin/js/customize-controls.js

@@ -2339 +2339 @@
                                 }
                                 picker.val( value );
                                 picker.wpColorPicker( 'color', value );
+                                picker.wpColorPicker( 'instance' ).element.trigger( 'change' );
                         } );
 
                         // Collapse color picker when hitting Esc instead of collapsing the current section.