Wella Koleston Intense Hair Color 301/0 Blue Black offers vibrant, long-lasting color with 100% grey coverage. Enriched with argan oil for deep conditioning and shine, it provides salon-quality results at home. Ideal for those seeking a bold, captivating look. Key Features 100% grey coverage 8 weeks of color intensity Moisturizing treatment with argan oil Advanced damage treatment Easy to apply and does not drip Moisturizing Treatment With Argan Oil, Color Cream, Color Developer, Advanced Damage Treatment.Wella: Experts in hair color and care, offering salon-quality products for vibrant, long-lasting results.Apply To Unwashed Hair, Leave For 30 Minutes, Rinse, And Apply ConditionerHair Colorant Warnings: Must perform a patch allergy test 48 hours before use. Severe allergic reactions possible. Contains Ammonia and Hydrogen Peroxide.