The main device (symbol) in the Bogan blazon is the cockatrice . The three main tinctures (colors) are sable, argent and gules .
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 1. 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 2. Although it may seem a sombre tone, and does indeed sometimes denote grief, it is more commonly said to represent Constancy 3.
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) 4. In a sketch or drawing it is represented by plain, unmarked paper 5.
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.6. The word gules is thought to come from the Arabic gule, or “red rose” 7. Later writers associated it with the precious stone ruby and the metal iron 8, perhaps because of the red glow of iron in the heat of the blacksmith’s forge.
Nowadays we might conflate many mythical creatures under the heading of dragon but to the heraldic artists there was a whole menagerie of quite distinct beasts, the cockatrice or basilisk being one of them. 9 Whilst both the dragon and cocaktrice are winged and scaled, the cocaktrice stands on two legs rather than four. Given the reputation of the basilisk we should not be surprised to find its meaning ascribed as representing “terror to all beholders”. 10