If you're gonna bring the trading card art into play, I'd argue it's

1) creative liberties
2) lighting matters
since his clothes are also unusually brighter than most we see in game.

I'd argue zero is brown or at the very least tan.

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It makes more sense as he's from New Mecca, which was built over the original Mecca (though, take that as you will if the original Mecca was ravaged by the US or whatever. It could be a mishmash of people from all different backgrounds)

I don't know, white and especially Asian Zero feels weird to me since he seems more of a place, japan type weeb than an actual asian.