I have just read the last page or so, but are you specifically trying to breed for show quality fish, or just nice quality pets and maybe show a couple of the best fish from the spawn?
If you aren't breeding for show, I wouldn't worry too much about whether the fish has a mix of colours. Most pet buyers go for the flashiest fish without worrying if it meets show standards or not, so if that is going to be your majority market, I say have fun with these two and see what you get. They are definitely not the worst pair of fish I have seen put together on this forum. I quite like them actually.