public function getFullRESTValue(Tracker_FormElement_Field $field)
 {
     $color = null;
     $decorators = $field->getDecorators();
     if (!empty($decorators) && isset($decorators[$this->getId()])) {
         $decorator = $decorators[$this->getId()];
         $color = array('r' => (int) $decorator->r, 'g' => (int) $decorator->g, 'b' => (int) $decorator->b);
     }
     return array('id' => $this->getId(), 'label' => $this->getLabel(), 'color' => $color);
 }