public function form_element($value = '')
{
return sprintf('<input class="fm-element fm-colorpicker-popup" name="%1$s" id="%2$s" value="%3$s" %4$s />', esc_attr($this->get_form_name()), esc_attr($this->get_element_id()), esc_attr($value), $this->get_element_attributes());
}