agreed with aquaeyes on the silvers, you cant get silvers from black into blue. this is why i like mussie genetics, once you learn it you get addicted! the calculator is a good guide but in reality it takes a while to find out what genes your birds are carrying, but again thats the fun of it.
hi, here goes on some colour theory.
black x black = black
black x blue = 50% black %50 blue
black drake x chocolate = black
black(carrying chocolate)drake x chocolate = %50 black 50% chocolate.
obviously you'll get different amounts of barred and colour/white with the patterns.