I have brown hair, quite common I guess.
Yeah it is, it is the second most common, after black, which I have.
And what is the least common hair color?
I would say it is red hair since only 1-2% of the population has it. It's a shame because it is very pretty.
Yes It is.  I guess that is why some people dye their hair red.   Do you know what makes hair a specific color?
It has to do with pigment. So high levels of eumelanin makes the hair dark while lower levels of pheomelanin make the hair lighter.
Interesting.  And any idea what makes some hair curly?
I'm not sure I would think genetics. People that have brown hair are usually called brunette's. Do you get called that?