I would say I'm a level 7 or so, dark blonde, and it got me to about a 10, a very light blonde. Didn't get my hair as bone white as some more generic brand I bought at Sally's Beauty last year, and left me a little yellow and crunchy/porous, however, it was a lot easier to use than that other brand because it was liquid instead of powder. My hair took the color I then put on (a mixture of AF and GDY) very well, and is holding onto it very well despite it being semi-perm!