AWESOME.
I can't dye my hair anything but black. It won't take anything else. I even tried bleaching part of it out so I could color it. My hair was so resistant to the bleach that they had to keep applying more and more, a stronger mixture each time, and I wound up with a chemical burn on my scalp (because I have uber-sensitive skin). So then I went to another salon later to have that bleached streak dyed blue...and NONE of it would stay. It would just rinse out. :/ Even though it was bleached.
Last month I went to dye my hair black for a cosplay at Comic-Con. I used a semi-permanent because I didn't think I really needed a permanent. It washed right out.

I did it a second time and just tried not to wash my hair much until the cosplay.
My hair is made of Teflon. D:
edit: Oh and you're lucky, my parents (especially my mom) was really mean about people who dyed their hair/had piercings etc. I pierced my nose in college (I was over 18 and everything) and my mom threw a temper tantrum any 2 year old would be proud of. -_-