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. Semi-permanent hair color. Stronger and longer lasting. 4 oz bottle with snap top. Free from: cruelty, parbens, gluten, ammonia, resorcinol, ppd, and phthalates. Vegan. Made in the USA.