GUILT-FREE GLAMOUR!®Blue Panther® is a rich, deep violet-blue hair dye with cool blue/purple undertones. For best results, use this dark, velvety shade on pre-lightened hair! Please note that since Blue Panther® is so pigmented, it should work well on most hair levels but due to its blue undertone, it can clash with very orangey base tones on virgin, unbleached hair! Blue Panther can also be added into lighter colors like Amethyst Ashes to punch up their vibrancy and staying power! Details: Style: Classic Semi-Permanent Hair Dye Color: Blue Panther® Color Description - Cool Blue Black 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™.