Color picker for EasyAdmin - simple https://mysiar.github.io/dev/2020/05/23/color-picker4easyadmin.html

ColorPickerType.php

<?php
declare(strict_types=1);

namespace App\Form;

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

class ColorPickerType extends AbstractType
{
    public function getParent(): string
    {
        return TextType::class;
    }

    public function configureOptions(OptionsResolver $resolver): void
    {
        $resolver->setDefaults([
            'attr' => [
                'class' => 'form-control colorpicker',
            ],
        ]);
    }
}