I'm no expert but I think that red is dominant over blue and blue is dominant over brown. I mated my red check cock to my blue bar hen and they threw out a red check and red bar. I was told that this color mating would have a 50/50 chance of going either way. They could have both come out blue or one blue and one red. In my case they both turned out red. I'm sure one of our genetics experts will chime in to better explain.