|Tricking abbr.||g., Gu.|
In heraldry, gules is the tincture with the colour red. It is one of the class of five dark tinctures called "colours", the others being azure (blue), sable (black), vert (green) and purpure (purple).
The term gules derives from the Old French word goules, literally "throats" (related to the English gullet; modern French gueules), but also used to refer to a fur neckpiece, usually made of red fur.
Examples of coats of arms consisting of purely a red shield (blazoned gules plain) include those of the d'Albret family, the Rossi family, the Swiss canton of Schwyz (prior to 1815), and the old coats of arms of the cities of Nîmes and Montpellier.
The Royal Arms of Scotland (Livro de Armerio-Mor, c. 1509), Or a lion rampant Gules within a double tressure flory-counter-flory of the second