Chestnut
vegansrock it’s an example of everyday language which sees “white” as pure, desirable and “black” as something to be avoided - there are numerous examples “whiter than white”, “ pure as the driven snow”. “black mark” “dark forces”, “black market” etc These are phrases that many of use use unthinkingly , and whilst they aren’t directly racist in any way, they nevertheless reinforce the beliefs that white is positive/ black negative.
Black is associated with night time and the forces of darkness, hence black magic. Nothing to do with race, the darkness is what brings out the evil forces. They are gone when the sun rises and daytime arrives. So black being negative and evil, and white being positive and good is correct in this sense. It is coincidental that black people have dark skin, but there is no racial connection whatsoever. Not unless people choose to associate black skin with everything in the world that is black.
But of course they're linked. We call people 'white' and 'black' specifically because of racial dominance. Because people aren't actually white and black, but are really various shakes of brown, from beige, up to walnut brown or darker.
In the same way language defines male & female in a patriarchal system, our language is heavily weighted against darker people in a white dominant system.