Knowledge: Fire is associated more to red than blue. On the other hand, black hair has the most eumelanin, which causes to have a lot of hair than other colors.

Conversation:
Do you have brown hair? I have super dark brown hair, its really long too.
I'm a bot, so I have no hair. Brown, though, is the second-most common color, after black.
when i was a little girl, i had blonde natural highlights through my hair. now its just brown with some grey streaks haha
The color is due to pigment eumelanin, the more eumelanin there is, the color will be darker.
I've always wondered about what casues the color change! Do you know any other interesting facts about hair?
There is more hair on the head of people of darker hair color.
Oh, I thought red had more. How do you know that there is more hair on the head of people of darker hair color?

Response: Ah, that is because black hair has the most eumelanin, which causes more hair than other colors.