Is my beige chinchilla beige?

I got a 10 week old from a vet on craigslist. I named her Serenity even though she is the complete opposite, she is around 14 weeks now. The lady told me she was a beige, and when I first got her that's what she looked like, but now I'm not so sure. She is light beige everywhere except her face and back. Her face has a dark mask and her back is dark as well. What color is she?? Or is she a beige?