luadotsh/lua

enum Color: string
{
    case RED = 'red';
    case ORANGE = 'orange';
    case YELLOW = 'yellow';
    case GREEN = 'green';
    case CYAN = 'cyan';
    case TEAL = 'teal';
    case BLUE = 'blue';
    case INDIGO = 'indigo';
    case PURPLE = 'purple';
    case FUCHSIA = 'fuchsia';
    case PINK = 'pink';
    case ZINC = 'zinc';
}

use App\Enums\Tag\Color;

class Tag extends Model
{
    // ...

    protected function casts(): array
    {
        return [
            'color' => Color::class,
        ];
    }

    // ...
}

use Illuminate\Foundation\Http\FormRequest;
use Illuminate\Validation\Rules\Enum;
use App\Enums\Tag\Color;

class CreateRequest extends FormRequest
{
    public function rules(): array
    {
        return [
            'name' => ['required', 'string', 'max:255', 'min:2'],
            'color' => ['required','string', 'max:255', new Enum(Color::class)],
        ];
    }
}