Will this shampoo cover my gray hair completely, or just blend it?

This product is a toner, not a permanent colour. On scattered gray hairs it deposits a cool pearl pigment that reduces the contrast between gray and your base shade, making the overall look more unified. The result is a softer, translucent veil — think “toned down” rather than “covered up.” If you have a high percentage of gray or want solid, root-to-tip coverage, a permanent or demi-permanent dye is the appropriate choice. On hair that is already light blonde or pre-lightened, the pearl tone will appear stronger and more visible on gray strands; on medium brown hair the effect is subtler, mainly cooling any brassiness while slightly muting the gray. A strand test on a hidden section (behind the ear or at the nape) will show you exactly how your own gray reacts before you commit to the whole head.