I am doing the same. I believe Black would be the recommended choice. True blacks though, are difficult to find. I have a lovely BBS Black cockerel, but I don't particularly want to use him in my BBS pen. I would rather hold out for a SUPER nice TRUE black roo.I am trying to get my pens organized and was thinking instead of having a BBS just do Splash and Blue because I want to avoid blacks in that pen. I have another pen with strictly blacks. So will it be better to have a Splash roo even though the color might dilute over time (can always breed back to black) or add a blue roo (knowing i might get 25% to get black)?