Question: what is the difference between dark brown and black hair?
Answer: There are different types of melanin with different hues. ... Brown-black hair has a mix of black and brown eumelanin, but mostly the black type. Brown hair has lots of brown eumelanin, and often some pheomelanin that makes it appear a bit reddish in the sunlight. Light brown hair has some brown eumelanin, but not a lot.