The two main devices (symbols) in the Dougal blazon are the bull’s head and mount. The two main tinctures (colors) are vert and argent.
The deep green colour that is so often observed in heraldry is more properly known as vert. According to Wade, the use of this colour signifies “Hope and Joy”, but may also represent, rather delightfully, “Loyalty in Love” 1The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36. It has other names also, the French call it sinople, perhaps after a town in Asia Minor from where the best green die materials could be found 2A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Vert. More fanciful heralds liked to associate it with the planet venus and the precious stone emerald 3Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 27. More strangely, there is some evidence that the term prasin was anciently used, being the Greek for the vegetable we call the Leek!
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 4Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 5A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
Bulls, and their close relations, cows, calves, oxen and the buffalo are relatively recent additions to the art of heraldry (and it is not always possible to distinguish between them in their renderings). 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Bull They can be found in a variety of poses and may have horns, hooves and collared in a different colour. The writer Guillim noted that the prescence of a bull could signify ”valour and magnanimity”. 7A Display of Heraldry, J. Guillim, Blome, London, 1679, P117
The mount (also known as a hillock 8Boutell’s Heraldry, J.P. Brooke-Little, Warne, (revised Edition) London 1970, P 324) is the area at the base of the shield and when so described is almost always green, and somewhere that another charge is placed, to appear more realistic, or give it a specific relationship to other charges around it. 9A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Mount Indeed, unlike like most of the flat, geometric shapes used to divide the field of the shield, the mount may be drawn with tufts of grass and a distinct slope!