So this is how they do it... Pre-lighten hair to a level 7 using Naturlite (White), Aqua Boost, and 30 volume cream; Rinse Naturlite, Spray hair with Revamp, Comb through; Using 7rc, 7fr, 7bc, XBR, and 20 volume cream; Apply color from roots to ends; Process under heat for 15 min. and 15 min. out; Wet hair slightly, Emulsify, Rinse hair until water runs clear, Shampoo and Condition.
Take the "brassiness" out of your hair color with this DIY spray toner: fill small spray bottle 2/3 with vinegar, 10 drops blue food coloring, 3 drops red; add a bit of a leave in hair conditioner and fill rest with water. Spray on dry shampooed hair, let dry. Repeat if needed for less brassy tone.