Theirs no real way to tell what color they will grow up to be, like my chicks were a crossbreed of vanaraj and kadaknath (country chickens) and one of them was black, and it became a totally different chicken with brown feathers and zero traits of black, though i don't have pictures of her, still I will guess these chickens color though.
Chick1 - might be gray or some kind of black and brown
Chick2 - Will be gray and brown with some black on the head I guess
Chick3 - Idk, also I guess she wouldn't live long enough to be adult (i guess she is sick, because of the picture you sent lol)
Chick4 - Gray-black gradient i guess
Chick5 - would not live long enough
Chick6 - Black (Is he older than others? lmao)
As I told you, their is not any ways to actually determine it, these are just guesses