Creepy as fuck
In the US, darker skin has been associated with health and pale skin with sickness. The Great American Mark Twain goes into length explaining:
[White skin] is not an unbearably unpleasant complexion when it keeps to itself, but when it comes into competition with masses of brown and black the fact is betrayed that it is endurable only because we are used to it. Nearly all black and brown skins are beautiful, but a beautiful white skin is rare. How rare, one may learn by walking down a street in Paris, New York, or London on a week-day—particularly an unfashionable street—and keeping count of the satisfactory complexions encountered in the course of a mile. Where dark complexions are massed, they make the whites look bleached-out, unwholesome, and sometimes frankly ghastly. I could notice this as a boy, down South in the slavery days before the war.
The splendid black satin skin of the South African Zulus of Durban seemed to me to come very close to perfection. I can see those Zulus yet—'ricksha athletes waiting in front of the hotel for custom; handsome and intensely black creatures, moderately clothed in loose summer stuffs whose snowy whiteness made the black all the blacker by contrast.
[Segment in which Mark Twain goes on to caricature various white skinned people]
No end of people whose skins are dull and characterless modifications of the tint which we miscall white. Some of these faces are pimply; some exhibit other signs of diseased blood; some show scars of a tint out of a harmony with the surrounding shades of color. The white man's complexion makes no concealments. It can't. It seemed to have been designed as a catch-all for everything that can damage it. Ladies have to paint it, and powder it, and cosmetic it, and diet it with arsenic, and enamel it, and be always enticing it, and persuading it, and pestering it, and fussing at it, to make it beautiful; and they do not succeed. But these efforts show what they think of the natural complexion, as distributed. As distributed it needs these helps. The complexion which they try to counterfeit is one which nature restricts to the few—to the very few. To ninety-nine persons she gives a bad complexion, to the hundredth a good one. The hundredth can keep it—how long? Ten years, perhaps.
The advantage is with the Zulu, I think. He starts with a beautiful complexion, and it will last him through. And as for the Indian brown—firm, smooth, blemishless, pleasant and restful to the eye, afraid of no color, harmonizing with all colors and adding a grace to them all—I think there is no sort of chance for the average white complexion against that rich and perfect tint.
-Mark Twain, Following the Equator
Mark Twain wrote this while he was in India, after visiting a Jain temple and remarking on the people there. He gives a convincing argument.