Beauty Product Reviews
This is a professional line; if you aren't a hairdresser, I recommend going to one. Color is tricky. As a stylist, I don't mind doing corrective color, but it's more expensive than if you got it done correctly the first time.
The duration of time the color stays in the hair depends on the starting color, porosity, and other factors. On prelightened hair, it lasts much longer. It stains the cuticle, so try something like hair chalking or manic panic before you go with this line. As a pro, this is in my top two to do bright colors.