The basics The Reel Hair Dark Palette is used to darken light hair, or even gray hair.  The benefits The colors in this palette are waterproof and require very little or no touching up. The uses You may also use this product to paint single hair strokes, using a fine brush, especially around the thinning edge of the hair. You can also use this palette to darken a scalp. The pro tip Activate with recommended activator or 99% Alcohol and spray over the colors to activate them or rehydrating during use.