Do you do this to your chocolate hair color formulas? The truth is chocolate comes in an array of shades but a warm chocolate is just that. Warm! Adding copper to my base formula is going to richen up the Natural Brown. The amount of copper is upto you, but this client showed me tons of pics that were rich and warm. Using Gold or B’s was not going to be enough. Here is my @kenraprofessional demi formula 👇🏽 1oz 7NB 1/2oz 6C 3oz 9Vol developer Learn more about toning in the Ultimate Toner Guideb