using System;

public class Program

{

    public static void Main()

    {

      byte c = 1;

      byte mask = (byte)~(c + (c << 2) + (c << 4) + (c << 6));

      Console.WriteLine(Convert.ToString(mask, 2));

​

      for (byte i = 0; i < 255; i++)

      {

          var control = C(i);

          var test = Convert.ToString(c, 2).PadLeft(2, '0');

          var t1 = control.Substring(0, 2) == test;

          var t2 = control.Substring(2, 2) == test;

          var t3 = control.Substring(4, 2) == test;

          var t4 = control.Substring(6, 2) == test;

          var hasColor = t1 || t2 || t3 || t4;

          byte M = (byte)(i ^ mask);

          byte T = (byte)(~(M + 85) & 170);

          byte R = (byte)(T & M);

          Console.WriteLine($"{C(i)} -> {C(M)} => {C(T)} -> {C(R)} : {R != 0 == hasColor}");

      }

    }

        private static string C(byte x)

        {

            return Convert.ToString(x, 2).PadLeft(8, '0');

        }

}