LF Buff columbian wyandottes?

[Jowsi002]

I’ve tried figuring this out on my own but I’ve just gotten increasingly confused with buff and columbian genetics.
What would be the easiest way to get LF buff columbian wyandottes? I have a good pair of buff wyandottes now that originally was thinking along the lines of getting buff brahmas to cross with but would that be a challenge to get the correct markings?
Can I stay true to wyandottes and cross mine with columbian wyandottes and get buff columbian down the line?
Or should I start with crossing columbian wyandottes to buff brahmas, to better preserve the pattern?

 

[Amer]

What's wrong with breeding buff to buff? That would be the best way to keep the color and breed type, but if you must outcross, breeding to columbian Wyandottes is better than introducing Brahma traits.