Whites/colours?
Nah, just say one team in B/W and the other in white. everyone must have at least one of these.
Black/whites and colours then, could just be any away kits then (apart from white/black ones obviously).
That'd be easy enough. Daft having black and whites versus whites IMO as a couple of our kits that people might turn up in are more white than black.
Ok then, B/W v Blue(s)