The two main devices (symbols) in the Ascue blazon are the donkey and fesse. The three main tinctures (colors) are argent, sable and gules .
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) 1. In a sketch or drawing it is represented by plain, unmarked paper 2.
Sable, the deep black so often found in Heraldry is believed to named from an animal of the marten family know in the middle ages as a Sabellinœ and noted for its very black fur 3. In engravings, when colors cannot be shown it is represented as closely spaced horizontal and vertical lines, and appropriately is thus the darkest form of hatching, as this method is known 4. Although it may seem a sombre tone, and does indeed sometimes denote grief, it is more commonly said to represent Constancy 5.
Gules, the heraldic colour red is very popular, sometimes said to represent “Military Fortitude and Magnanimity”6. It is usually abbreviated as gu and in the days before colour printing was shown in a system known as hatching by vertical lines 7. Although it may look like a French word it is normally pronounced with a hard “g” and may be derived either from the Latin gula (throat) or Arabic gule (rose).8
In the mediaeval period there was no real percieved difference between real and mythical animals, after all, much of the world remained unknown and who was to say what strange and magical creatures existed in distant lands? Nevertheless, real animals 9 are perhaps one of the most common sights on coats of arms, especially animals of European origin. The horse Is a typical example of these.The Donkey can be taken to have the same significance as the horse.
The fesse (also found as fess) is one of the major ordinaries to found in heraldry, being a bold, broad, horizontal band across the centre of the shield. It may originally have arisen from the planks of which a wooden shield can be constructed, the centremost plank being painted a different colour 10. It is instantly recognisable as a symbol, for example the arms of COLEVILLE granted during the reign of Hery III are simply or, a fesse gules. With this clear association with the construction of the shield itself, Wade believes that the fesse can be taken to be associated with the military, as a “girdle of honour”.