L'Oreal Paris Men Expert One-Twist Permanent Hair Color Kit Deepest Black 00 L'Oreal Paris Men Expert One-Twist Haircolor Permanent Hair Color, will cover your grays in just 5 minutes. The product provides undetectable gray coverage that fades naturally in 6 weeks. So easy, just twist, shake, and apply The results speak for themselves, 97% of men claimed satisfaction and 9/10 men would recommend to a friend. When in doubt or unsure of which shade to choose, always go with the lighter shade- If you are still having our difficulty try our shade matcher tool