PIGMENTATION • DICCIONARIO INGLES.COM • Definition of Pigmentation

... high cheek bones appeared to have been bred out of them, as were those of the relatively short legs and the muddy yellow skin. To call them yellow was more figurative than literal. Their skins were whiter than those of our own weather-tanned forest men. Nevertheless, their pigmentation was peculiar, and what there was of it looked more like a pale orange tint than the ruddiness of the Caucasian. They were well formed, but rather undersized and soft-looking, small-muscled and smooth-skinned, like young girls. Their features were finely ...

— The Airlords of Han • Philip Francis Nowlan

... landing-grid suspicions was a case in point. Blueskins were people who inherited a splotchy skin pigmentation from other people who'd survived a plague. Weald plainly maintained a one-planet quarantine against them. But a quarantine is normally an emergency measure. The Med Service should have taken over, wiped out the need for a quarantine, and then lifted ...

— This World Is Taboo • Murray Leinster