Tricking in the context of "Tincture (heraldry)"

Tinctures are the colours, metals, and furs used in heraldry. There are nine tinctures in common use: two metals, five colours, and two furs. The metals are or (gold or yellow) and argent (silver or white); the colours gules (red), azure (blue), vert (green), sable (black), and purpure (purple); and the furs ermine, which is derived from the winter fur of a stoat, and vair, which is derived from the fur of a red squirrel. The use of other tinctures varies depending on the time period and heraldic tradition in question.

Where the tinctures are not depicted in full colour, they may be represented using one of several systems of hatching, in which each tincture is assigned a distinct pattern, or tricking, in which each tincture is designated by a letter or abbreviation.