Index: src/wp-admin/js/customize-controls.js
===================================================================
--- src/wp-admin/js/customize-controls.js	(revision 39941)
+++ src/wp-admin/js/customize-controls.js	(working copy)
@@ -2339,6 +2339,7 @@
 				}
 				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.