REEL HAIR PALETTES are created to either lighten hair or darken hair depending on the palette you choose.  Obviously the Lite palette is designed to lighten hair.  

The  REEL HAIR DARK PALETTE is used to darken light or gray hair.  You can also use this palette to darken a scalp in a pinch.

The REEL HAIR SILVER PALETTE is another way to go to lighten or streak dark hair.  Some artists prefer the more opaque colors (REEL HAIR (Lite) PALETTE) while other artists prefer a more reflective color.

The REEL HAIR HIGHLITER METALLIC PALETTE is used to streak hair, and/or to add metallic highlights which are many times required to eliminate the flat and/or dark look due to poor lighting conditions or film distortion.