Black chickens are less “obvious” to predators. Chickens who are multi colored are much less so. White chickens might as well have a light beacon to predators. Black ones who roost in trees do not get picked off by owls like white ones.
Turkens are great chickens. Not too pretty, but huge chickens and they lay thru the winter. They get pretty broody too. The older heavy breeds are ones who will do their own “grocery shopping”.