I went jet black in college with a box dye from CVS and two weeks later decided I didn't want to be jet black anymore. The amount of damage I did to my hair trying to get that color out is something I'm still a little mad about. I had to cut four inches off. Four inches. Because I didn't understand that permanent hair dye means permanent, it doesn't wash out, it doesn't fade, it grows out or you pay someone a lot of money to fix it. That was a $200 color correction at a salon