HEALTH & BEAUTY HAIR COLOR & DEVELOPER REVLON Weight: 110GM. REVLON HAIR COLOR SILK 12 NATURAL BLUE BLACK, features a blue-black shade. It leaves hair feeling soft, smooth, and healthy. It can be used on both light and dark hair and is safe for daily use. Revlon hair color silks are the best way to get salon-quality results at home. Theyre easy to use and leave your hair looking natural, glossy, and healthy. This hair color silk contains only natural ingredients, so you can trust it to be gentle on your hair. Plus, this formula is free of damaging sulfates, which means it will leave your hair shiny and healthy. The silk formula is lightweight and wont cause build-up, making it perfect for all types of hair. Plus, this color will last up to four weeks.