I honestly have no idea what kind of developer it was. Im not that keen on hair coloring, this was the first time I have done it. It came out slightly too dark. I think I need to go down a shade lighter. I just used this nice n easy brand because i remember it used to be recommended on here. Is 20 developer too high? I know your great with hair coloring. do you have any suggestions? I have two systems left that still need coloring.