Cream Formula for Semi-Permanent Hair Colour. Vegan Friendly & Cruelty Free! Manic Panic, with 40 years of history in leading the colour rebellion, is proud to say their hair colours have always been Vegan and Cruelty Free. And their products are also: Paraben-free, Gluten-free, Ammonia-free, Resorcinol-free, PPD-free, Phthalate-free, & Made in the USA. 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 green. Style: Classic Semi-Permanent Hair Dye Colour: Shocking Blue Colour Description – Dark Blue Hair Dye Additional Features: Benefits of Conditioning Hair, Resealable Tub For Longer Use, Comes With Instructions Duration: 4 – 6 weeks