jQuery color picker function on change

  $('yourColorpickerselector').wpColorPicker({
                        change: function(event, ui) {
                            var form = $(this).closest('form')
                            form .trigger('change')
                        }
                    });

within color picker default method “change”. you can trigger form change. or any other function, what you want to do.

related link :
wordpress discuss
iris color picker