ok. I think I misunderstood you earlier. I thought you were saying a BO-Buff Orpington. I think I understand now that you are asking about a BlkO-Black Orpington, right? It should work the same. Because theoretically you blkO should pass on black color genes. But I dn't know for sure. From what i'm told it doesn't matter if a splsh is bred to a black the chicks will all be blue? Something to do with the way the blk gene works. But I admit I am conciderably new to this as well, having only been breeding and raising chickens for a few years now. However, I learned a lot about how color genes work in horses and dogs from the last twenty-five years working with them. I'm finding that the color genes tend to work the same with the birds, but there are some differences.