GUILT-FREE GLAMOUR!® Shocking Blue is a dark blue hair dye with purple undertones. This color can add dark blue highlights to virgin, unbleached hair, but for best results, we recommend lightening hair to very light level 9 blonde or lighter and toning hair that has yellow tones before use to avoid your hair turning purple. * Style: Classic Semi-Permanent Hair Dye * Color: Shocking Blue * Color Description -  Dark 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™.