Help identify this chick breed

[MountainMamaWNC]

Purchased this chick from local feed store they said they had barred rocks, Rhode Island blues, and black Astro.
Is this chick one of those?

looks browner in pic but mostly black with grayish under side and maybe a pale yellow butt

 

[JedJackson]

Could be a Rhode Island blue, but it is black. Blue color genetics mean that black, blue and splash chicks are created when you cross blue parents. She'll have some red/brown in her plumage too, probably.