What is wrong with this code ?

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C#

what is wrong with this code ?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace enums
{
    class Program
    {
        static void Main(string[] args)
        {

            Console.WriteLine((byte)Color.Yellow)  ;

                Console.WriteLine((byte)Color.Brown);
            Console.ReadKey();

        }
    }


    enum Color:byte
    { 
    
      Yellow,
      Blue,
      Brown,
      Green
    
    }

    enum Shades:Color
    {
    }
}

What I have tried:

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