Demi-permanent hair color is “deposit only,” and does not contain ammonia so it will not "lift" of lighten hair. However, demi-permanent color does contain a small amount of peroxide, which allows for a subtle, but noticeable, color enhancement and increased longevity. Demi-permanent hair color is long-lasting—up to 24 shampoos; it adds richness and depth to natural color; it beautifully blends up to 50% gray; and it may be used on texturized or relaxed hair.