The main device (symbol) in the Denvers blazon is the gauntlet. The main tincture (color) is gules.
The bold red colour on a heraldic shield is known as gules. It has a long history within heraldry, it is known that one of those who besieged the scottish castle of Carlaverock in 1300 was the French knight Euremions de la Brette who had as his arms a simple red shield.1The Siege of Carlaverock, N. Harris, Nichols & Son, London, 1828, P180. The word gules is thought to come from the Arabic gule, or “red rose” 2Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 313. Later writers associated it with the precious stone ruby and the metal iron 3Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53, perhaps because of the red glow of iron in the heat of the blacksmith’s forge.
The gauntlet is an armoured glove, part of a knights attire and when used as a device on the shield it should be stated which hand it is for. 4A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Gauntlet They are quite a complex device visually, with distinct panels and rivets visible. Wade tells us, probably with good reason that it represents “a man armed for performance of a martial enterprise”. 5The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P93