Redken ColorFusion Advanced Professional Permanent Cream Hair Color 2.1oz 3Rv Redken ColorFusion Advanced Professional Permanent Cream Hair Color 3Rv supplies a Red/Violet color to your hair. It can be used to lighten, darken, match natural hair color, cover gray, or create high fashion techniques. To maximize its amazing performance, Color Fusion features an advanced formula that will enhance your color service in every way.