Revlon Colorsilk 37 Hair Color 130ml With Revlon Colorsilk 37 Hair Color, youll get a 100% gray coverage that gives you long-lasting, natural-looking results. The formula is ammonia-free and infused with nourishing silk proteins that leave your hair feeling soft and looking shiny. Its a salon-quality hair dye that is easy to use at home, saving you time and money. Achieve your desired hair color with Revlon Colorsilk 37, the trusted choice for beautiful hair.