如何在Symfony中将choiceType值显示为颜色

namespace App\Form\Type;

use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
use Symfony\Component\OptionsResolver\OptionsResolver;

class ColorChoiceType extends AbstractType
{
    public function configureOptions(OptionsResolver $resolver)
    {
        $resolver->setDefaults([
            'choices' => [
                'Red' => 'red',
                'Blue' => 'blue',
                'Green' => 'green',
                // 添加其他颜色选项
            ],
            'expanded' => true,
            'multiple' => false,
            'choice_attr' => function ($choice, $key, $value) {
                return ['style' => 'background-color:'.$value.';'];
            },
        ]);
    }

    public function getParent()
    {
        return ChoiceType::class;
    }
}

use App\Form\Type\ColorChoiceType;
use Symfony\Component\Form\AbstractType;
use Symfony\Component\Form\FormBuilderInterface;

class YourFormType extends AbstractType
{
    public function buildForm(FormBuilderInterface $builder, array $options)
    {
        $builder
            // 其他字段
            ->add('color', ColorChoiceType::class, [
                'label' => 'Choose a color',
            ]);
    }
}

{{ form_start(form) }}
    {{ form_row(form.color) }}
    {# 渲染其他字段 #}
{{ form_end(form) }}