It’s so hard to say from pics, it could be dark brown or black. The overall look says roux to me, but I know sparkly can really enhance other colors and patterns.
Roux is sex linked, a female can only have 1 copy of roux, if she has one, she will be roux colored. To be roux colored a male needs 2 copies of roux. If you cross a roux male to a non roux female, you can gender the chicks at hatch, all reds (roux) are hens, any non roux are males. All of those...