As a note, when you click to show all skin tones you can find:
efreeti, marid, dao, djinn, dryad, and vampire skin tones... so if they did do genasi and dhampir they'd be all set for color palettes. I've also used "dryad tone" when designing a portrait for a TTRPG character of the yuan-ti race since it gives a nice good green undertone to the browns.
