Apparently, according to at least one Hadith, Mohammed himself was white.
Weren't many of the Islamic rulers in Spain light-skinned?
That reminds me of a Crusader Kings 2 game I played where the main "villain" (at least from my perspective) was a very light skinned French Muslim ruler. Basically the Catholics in Iberia fell fast and France was easy for the Muslims to gobble up once it collapsed in a series of civil wars.
I did manage to defeat him and re-Catholicize a bunch of French territory but not accomplish my goal of converting to Orthodox and then Orthodoxizing the British Isles.
That sounds like a pretty interesting game, occasionally I think about buying a Paradox game but then they look too tedious so I stick to Total War.