Could be a Nosy Be or a Nosy Faly. Kind of has the colors for it. But it could be Blue Ambanja too like Bobcochran suggested. Or it could be a mix. Could be ANYTHTHING really if you aren't 100% for certain. It will always be a mystery.....
I suspect that he is a nosy be because of the very faint barring and the slope of his head. Blue ambanjas have darker barring, more red spots on their bellies, and have a straighter rostral with less of a slope.