GUILT-FREE GLAMOUR!®Blue Steel is a cool, silver hair dye with blue undertones. For best results, it is required to lighten hair to the lightest level 10 blonde or lighter and toning hair that has yellow tones before use to avoid undesired hues. Pastels/Greys/Toners contain less pigment than our vivid shades and will fade from your hair faster. Details: Style: Classic Semi-Permanent Hair Dye Color: Blue Steel Color Description -  Blue Toned Silver 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: 2 weeks For Best Results: See Instructions Tab  Tested on celebrities, not animals™.