Polish Chicks Color

[Chelelisl]

Hello! I have recently hatched out some chicks and I am pretty sure I know what most of their colors, other than I have a couple that are this dark color. What would this be? White Crested black? From pictures that I have seen, it seems too dark for that.
Chick is the one on the left.
Thanks

 

[Amer]

It is probably has one White Crested Black parent and one other parent. So it will be mostly black.