From AmtWiki

A color.

  1. A grey sash indicates a Monk.
  2. An arrow with a grey cover is a Phase Arrow.
  3. A grey spell ball is a Phase Bolt.
  4. In Heraldry grey uncommon, but when it was used it was called Cendrée or in Spain De piedra‎. They are described as the colour of ash or stone walls.
  5. Silver in heraldry is called Argent and is represented by White, not grey.