eCosmetics is an authorized retailer of Good Dye Young. Blue Semi-Permanent 5oz A hue to commit to. Our truest, bluest of blue.THE FACTSClassic, cool-toned, ultra-royal blue Semi-Perm 24+ washes Most vivid on level 7+ hair Combines salon-grade pigments with a nontoxic formula that deposits ultra vibrant color. Ours do not damage the hair, in fact theyu2019re super conditioning with a high-quality cream base that acts like a hydrating hair mask with essential oil benefits.