identifying this color's name

[luminor]

I just got a new female betta and I'm totally stumped by her colors - she's got this dark brown thing going on with chocolate undertones and blue streaks in her tail, plus a white face. Not quite sure what to call her, she's not a chocolate betta but definitely not black either. Anyone have a name for this coloration? I'll add some pics, but they don't really do her justice. She's honestly gorgeous, though.

[juicebox]

I'm not sure about the specific term for her coloration, but she's really pretty, the mix of dark brown, chocolate, and blue undertones is quite unique and beautiful.