I am no genetics expert by any means. Someone posted this once and I saved it. Looks like you are supposed to get 50% black, 25% blue, 25% splash with blue X blue. It doesn't matter to me really what I would get. I love the blues and the blacks and have both. I don't have any splash yet so I'm not sure about those.
Do you have eggs available now?
Chart to determine color possibilities with a Blue
and Black Copper rooster.
Blue X Blue = 50% Blue, 25% Black, 25% Splash
Blue X Splash = 50% Blue, 50% Splash
Splash X Splash = 100% Splash
Splash X Black = 100% Blue
Blue X Black = 50% Blue, 50% Black
Black X Black = 100% Black