Luckily, it only looks complicated. Choi started by lightening her clients hair from the bottom up, without bleaching the roots. "The lightened hair is lifted to a pale yellow, then is toned to a blondish white using Redken Shades 9v/clear to eliminate yellow," she told us last night. "The hair is completely dried, then the amethyst purple is applied on the mid sections, then the moonstone blue onto the very tips." Here comes the trick: "I use a brush and emulsify with my hands to blend the colors." This makes the grow-out process completely painless.