What would humans look like if they were genetically suited for life under a giant orange star like Iota Draconis ? These would be people who were genetically indistinguishable from humans from earth, but were altered to be better suited for their new homes.
Iota Draconis is 55 times more luminous than the sun and as such it will produce much more ultraviolet radiation, on average. Melanin pigment protects the body from UV rays, and the more melanin in the skin the darker it will appear. Iota Draconis is so harsh that you'd want vantablack people at least, and I'm not sure even that would be enough.
My guess is that the luminosity of the star will be so high that biological countermeasures fail and the colonists would have to resort to artificial protective gear instead. Then again, maybe the poles wouldn't be so bad.
Theory: more massive star -> warmer star -> higher black body radiation in higher frequencies -> more UV light.
So now we have Nilotic peoples... in space.
Practice: we're making risky assumptions that:
- there is a breathable atmosphere, otherwise if people have to wear space suits its irrelevant;
- amount of UV is within human tolerance level, otherwise would have to shield themselves anyway and its irrelevant;
- space faring civilisations forgot formula for high quality sunscreen, because otherwise parents aesthetic choices would trump such minor adaptation.