Besides being a conditioning at-home hair color option that comes with a shine serum, this product has excellent gray coverage, notes Courtney Perkins. She and Korab also love the wide range of shades, availability and accessibility of the product. The shade is easy to apply, doesn’t smell and leaves strands soft and shiny. The formula is enriched with argan oil, keratin and other anti-breakage ingredients for healthy, strong strands. You can buy it on the site desertcart, which operates in 164 countries.