it also could be diamante, if u look closely his tatoo on his eys are smiliars to diamante. Diamante have a Mustache too.
And I dont think Oda would reveal a yonkou on a colour page, but i could be wrong
( Ok haters post now, I will fight u all )
Forgive me for being a stereotypical hate-poster, but do you even think about what you're saying when you type out these posts?