Revlon Professional Color Hair Dye offers vibrant and long-lasting color results. Its formula is designed for professional use, ensuring excellent coverage and a natural-looking finish. Achieve your desired shade with this trusted hair coloring solution. This specific shade, No. 6.21 Ash-iridescent Dark Blonde, provides a cool-toned, sophisticated blonde hue that helps neutralize unwanted brassiness. It is ideal for those seeking a refined and modern hair color.