Matrix SoColor Honey Crème 4RV Dark Red Violet For rich, radiant, long lasting color that leaves hair healthy, silky and shiny. SoColor is the No. 1 professional color brand in the United States and is used in thousands of salons nationwide. With SoColor, there's no guesswork. Just exceptional color results. Advanced dyes deliver clarity and provide excellent gray coverage. The rich Alpha Honey Complex of conditioners adds silkiness and shine for results that are incredibly beautiful.