There’s nothing quite like stepping out of a salon and admiring your freshly cut and colored hair. After the first few hours, though, you may start to wonder how exactly you’re going to maintain your color at home, especially if you’re new to blonde hair. Allow us to introduce you to purple shampoo, your soon-to-be best friend. Purple shampoo helps tone blonde hair and prevent it from turning a brassy, yellow or orange hue. Find everything you need to know about using purple shampoo at home, ahead.