Making buff Columbian orps??

[bit o poultry19]

I have some English Buff Orpingtons and some White Columbian Wyandottes, I've heard about Buff Columbian Orps and I FELL IN LOVE with them!! I just had questions about how I would be able to "make" them, do I need a light sussex instead of a Whte Colum Wyan? How many gens would it take to start from scratch? How many different "breeders" would I need to avoid "inbreeding"? Thank you anything would help!!

 

[EdenCamp]

Why would you not use a columbian orp? Introducing another breed cross is going to take years. I have buff over white columbian chicks availble if you'd rather make your life easier.