Here we have Mathew, he's the mutant that can control technology 

As we all know, half his hair is white and the other half is black

Now, I always said that the reason for this was stress and dying his hair, but I feel like that kind of a dumb reason 

So I did some research and I was wondering if you like the idea of me giving him vitiligo 

He would remain white, but he'd have pure white patches on his body

This would also be the reason for why his hair is half white and half black

Please let me know what you guys think of this idea, since giving ppl skin conditions and diseases can be seen as rude