The Wella Koleston Hair Color Kit in shade 40 Medium Brown offers a luxurious and permanent hair dye solution for those seeking a rich medium brown hue. Infused with advanced color technologies, this hair color kit provides vibrant and long-lasting results. The key active ingredients in this formula work to penetrate the hair shaft, ensuring deep and even color coverage. The creamy texture of the dye allows for easy application, while the pleasant fragrance enhances the coloring experience. Achieve a stunning medium brown shade with professional-quality results that last.