It's something i've noticed, and it bothers me a bit. Pale skin is a really popular colour for ocs, and even main series characters in animes and cartoons are all pale (with the exception of Korra). I guess it just annoys me a bit, as it seems like no one wants their oc to be that colour, and idk, i guess i just find it a bit offensive. For me, one of my OCs i always imagine as being black, and that's Akira, and i can't picture her white and it kinda freaks me out to do so xD So i think it'd be great if more people started making ocs different colours ^.^ just my opinion, and i'm not hating on anyone's OCs for them being white.
I've always imagined Akira to look like Esmeralda, if anyone was interested-
As Esmeralda is a gypsy, and Khajiit are portrayed to be gypsies, so it only made sense.