I’m not asking about dark or light. I’m asking why not shades of blue or green?
Bonus question: hypothetically, what factors could lead to other skin colors, like the aliens in avatar?
In: 18
I can tell you why humans aren’t green. There aren’t many green animals with lifespans that exceed the spring/summer season simply because when it becomes winter, a large green animal would be easier to see due to a lot of the greenery/foliage being dead/dormant. That’s why you don’t see mammals with green fur. Typically mammals have black, gray, brown, or neutral colored fur.
In contrast, many insects are green colored, because they die in the winter season, so they don’t have to worry about camoflauge during winter.
I would also guess that humans aren’t blue for the same reason.
Latest Answers