
I think if you want to go down this road, you will need to do a lot more research on genetics. But, i would hazard a guess, that by the time you know enough to breed blue staffs, either the demand will have gone, or you might just have realized that there is more to breeding dogs than just the color of the resulting puppies.
I would concentrate far more on wether the pups were healthy, nice temperamented examples of the breed, not what color they are.
Emma