Color Oops Extra Strength Hair Color Remover is an easy and effective way to reverse undesirable hair color. Free from bleach and ammonia, our formula removes hair dye by shrinking dye molecules, allowing you to simply wash them away. Our hair color corrector is ideal for hair that has been colored with a regular, oxidative (mixed with developer) dye. Color Oops can remove artificial color from hair that has become too dark or from hair that was lightened but became off-tone. Results may vary depending on starting hair level, texture, and porosity. Not formulated to remove direct-application dyes or bold shades, such as pinks, blues, greens, or purples. See complete instructions for more information and cautions. Color Oops is dedicated to helping you solve any problem that can arise in the hair coloring process. We're hair for you!