Hmm in these photos I would say he could be Umbrous Champagne(Black+Rust+Cinnamon) which would explain his chocolatey coloring, his Brown Ears, and his red eyes. I suggest Umbrous cause he is quite a bit darker then the Champagne hamsters I have seen.
If he is Dove he is the darkest Chocolate like Dove I've ever seen.
My Dovey was and Umbrous Dove and she is not anywhere near as dark as this fella
Dovey-a.JPG