It's a game of chance figuring that out. Its like rolling dice and trying to know if you'll get a five or a one, unless of course you have a more dominate gene like if every one in the father's family has black but there is still a small percentage that the baby could get blond or even another color if its in either family tree
You have to look into your genealogy...its all about genetics...certain traits, and genes are passed down from generation to generation...just because your mother and father have blond hair, for example, you still can't expect just blond hair for your baby...your great grandfather might have had black, and your grandmothers red...which increases the chance of your baby not having blond hair...the more genetic variables your family possesses the more likely the genes will be hard to isolate and reproduce through genetic inheritance....
Pink because yellow and black make pink
Probably a dirty blonde colour=)
Like it was suggested, your baby could have either blonde or black hair. But I know a couple in a similar situation and their child's hair is brown.