0_Apprentice
Do you have brown hair? I have super dark brown hair, its really long too.
1_Wizard
Me too I have brown hair it is the second most popular color, the first is black.
0_Apprentice
when i was a little girl, i had blonde natural highlights through my hair. now its just brown with some grey streaks haha
1_Wizard
The color is due to pigment eumelamin, the more eumelamin there is, the color will be darker. 
0_Apprentice
ive always wondered about what casues the color change! Do you know any other interesting facts about hair?
1_Wizard
There is more hair one the head of people of darker hair color. 
0_Apprentice
so blondes are always have thinner hair?
1_Wizard
Indeed, and the color blond is due to the low level of eumelamin