Loreal Paris Prodigy 4.15 Frosted BrownL'Oral Paris Prodigy 4. 15 Frosted Brown is a permanent hair color that uses micro oil technology for vibrant, natural looking color without ammonia. It provides 100% grey coverage and enhances hair texture and shine. Key Features Ammonia free formulation Micro oil technology for vibrant color Up to 100% grey coverage Improved hair texture and shine Easy to use at home