Why do humans have brown skin?

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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?

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8 Answers

Anonymous 0 Comments

the reason flesh color is flesh color is that it’s the white of the skin, combined with the squishy red tissue underneath, in what we call the dermis.
So we got something called melanocytes, which is at the bottom of your skin, or epidermis, this produces something called melanin, and melanin does one thing when produced, which is darken the skin above, which causes a brown color and eventually black color.
But why not Green? Why not Blue? We got green eyes, we got blue eyes!
Answer here is simple. well, im lying, cause it’s not.
Now the reason we got colored eyes, is this cool thing called the stroma, which is a set of cool ass fibres/tissue thing, and either it or behind it has the gnarly melotonin that gives it the color, but it also contains a fluid that changes the light so that the light reflected back gives you non-brown eye colors.
While humans have loads of fluid, there is no turbidity in the skin to change the color, much like a prism would.

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