I can't see their wings extended to tell whether or not they are barred. If the main flight feathers are barred then they are Bb rather than BB which a true black would be.Ok, but you would consider the hens in the picture to be black?
This time of year is not the best time to be checking on feather color since a summer of sunshine will have the feathers bleached out to a certain degree. After they molt, the feather color will be at its truest color.