"White" isn't really a denotation of skin color, it essentially just means "of European descent" these days. These arbitrary designations change all the time (eg. the Irish and Romani were not considered "white" at one point), but it's pretty well settled now I think.

It's kinda like how you wouldn't call an Indian guy "black" even though some Indian people have skin colors darker than some black dudes.

(And Native Americans as well; my grandpa was put down as "black" mistakenly in a census because the census taker literally took one look at him, wrote "Negro" on the census, and left.)

I suppose some shade darker