I have super super dark brown hair most people think my hair is black
does your family also have dark hair - true black hair is a dominant genetic trait among people of all backgrounds and ethnicities
I know my mom is a red head, I never met my dad but my mom said his hair color was the same, and he was very light complected like myself and my mom
That's interesting because a darker person usually have more individual hair follicles on their scalp so they are darker.  Are you siblings the same?
I have 1 brother blonde and blue eyed
Is the blond yellowish color?  Very different than brown/almost black hair!  The 2 types of melanin: eumelanin and pheomelanin make up hair color. 
no it is very very blond, not a yellow color at all
I wonder if skin color has anything to do with it - skin pigmentation is also genetic from their birth parents. 
We are both very light complected, as well as both my parents, not sure where the dark hair came from as far as my dad goes, somewhere back in the genes I guess
Light skin is most commonly found amongst native people in Europe and NE Asia