Chlorine! I have brown hair but the Kool Aid came out fast. If you go swimming in a chlorine pool once or twice, it will probably come out. Let me know if this works for you - Skyla
If you put your hair in lemon juice, baking powder, and water first, (let it dry) it will soak in the color more and get rid of grease as well. Put 2 packs of kook aid in (red, blue, and green are...