Since the color is not uniform, I'd say, "Barnyard mix"... but sometimes they turn out to be the very most beautiful chickens...
I do have one exception. Got a little barnyard mix to put under a broody back at New Years and at present HE is one of the ugliest chickens I've ever laid eyes on. The only reason I'm keeping him is for curiosity sake... I want to see if he's still UGLY once he hits 5 months, I will probably end up eating him.