Some colors can be very interesting that way, changing in different lighting. That would definitely explain why it looked different in different photos.
Yes, I think it likely that the chick will look something like that pullet, or a blue version of the same, although of course I can't be certain.
He's pretty!
In the earlier picture, I thought I was seeing a lot of yellowish feathers on him. In this picture, I'm not so sure.
If he does have a bunch of yellowish feathers, a chick from that pair will probably not be black. It will probably have some pattern of gold or brown with black in...