Both the Moroccanoil Dry Shampoo Light Tones ($12-$26) and the Moroccanoil Dry Shampoo Dark Tones ($12-$26) have earned top marks from other shoppers . . . and use argan oil to hydrate hair and keep it healthy (with rice starch to absorb the oils). The key difference is that the light-toned option has violet pigments to balance out brassiness and the dark one won't leave brunettes with chalky-looking hair that no one wants.