I bleached my hair to a lemony blonde and kept MP-AT on for 4 hours. It was beautiful, really bright and vivid. Done on a light-enough hair it does come out a light blue, and as it settles, turns into 'Raquel Reed' Turquoise. Only downside is that you old people calling it green and visibly fades with every wash. Its Turquoise Blue X_x Would wear again if I find dreads to colour-match -CirqueMachine-