What is kristen stewarts natural hair colour?

Is it blonde? Because in panic room she has short blonde hair.But as she grows older and in interviews its dark brown and even her eyebrows match. Is it just brown dye or did she have to dye her hair blonde for panic room? Thanks for answers!What is kristen stewarts natural hair colour?
its dark red, they had to dye it to match her ';mother'; so that it looked like a natural family (you typically get your parents genetic dna and usually get your hair color from them) so thats why they had to dye it...her twilight hair is probably her natural hair and its dark red....What is kristen stewarts natural hair colour?
I think her hair is naturally brown and they needed to dye it blonde to match Jodie Foster's because they are meant to be mother and daughter and need to look more alike.
kind of like a milk chocolate brown (not too dark and not too light)

hair highlights