Hi Ya Pink.
That light chick in my first clutch grew up to be a BCM pullet, and very dark, hardly any coppering showing through. The Bill chick here doesn't look black to me, lots of blue in it. The only one that could possibly be black, also has blue colored shoulders, and some bluish streaks on the head. The body color is almost a flat black. Will be interesting to see how they all feather out!