GUILT-FREE GLAMOUR!® Blue Moon is a bright, neon, cool true blue hair dye. For the most vibrant results, we recommend lightening hair to a very light level 9 blonde or lighter, and toning hair that has yellow tones before use to avoid undesired hues. * Style: Classic Semi-Permanent Hair Dye * Color: Blue Moon  * Color Description -  True Blue Hair Dye * Volume: 4oz / 118ml * Ingredients: Vegan Friendly, PPD Free! * Additional Features: Benefits of Conditioning Hair, Resealable Tub For Longer Use, Comes With Instructions * Duration: 4 - 6 weeks * For Best Results: See Instructions Tab  Tested on celebrities, not animals™.