Revive faded denim and restore it to its original hue with this easy-to-use, 4-piece Rit Back to Blue Denim Dye Kit. Achieve the perfect blue with non-toxic, septic system-safe Bold Blue All-Purpose Dye, which can be diluted to create lighter shades. The kits ColorStay Dye Fixative keeps your intended color bright and bleed-resistant, and included gloves help minimize mess. All you need is water and a container or sink to get started upcycling your favorite jeans, jackets, and more. - Rit Back to Blue Denim Dye Kit.