Yeah, of course, if there are 1 person in 100 million who looks different, that must be the norm. Amazing logic.
Hey chill out, I was just pointing out it's possible, but I agree it's not the norm, and it would be better if he had dark coloured eyes.
Anyway, scrolling through the nobles in a new campaign I found Ashisa, Darim, Dhiyul, Ghuzid, Haqr, Shaima, Tahya, and Wahan to all have quite dark skin tones. While that very dark skin tone is indeed much less common in Aserai lands than mid-brown, this makes sense as Bannerlord represents a geographical area north of the Sahara, an area where mid-brown skin tones were and are much more common than dark-brown.
For comparison, here's a crowd of people protesting in Rabat, Morocco:
(source)
And some late Egyptian funerary portraits:
I agree with Blood Gryphon that children should either have a blended skin tone of the parent, or randomly chosen skin between the two, so skin tones don't average out to a global "mediterranean" tone so quickly within the second or third gen.
It would also be nice one day to have an expansion south of the Sahara (called "Nahasa" in Bannerlord's lore) with kingdoms like Mali and Great Zimbabwe.