The main device (symbol) in the Duston blazon is the buck’s head. The three main tinctures (colors) are gules, argent and or .
Red in heraldry is given the name Gules, sometimes said to be the “martyr’s colour”1. The colour is also associated with Mars, the red planet, and the zodiacal sign Aries 2. Later heralds of a more poetical nature would sometimes refer to the colour as ruby, after the precious stone.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 bright yellow colour frequently found in coats of arms is known to heralds as Or, or sometimes simply as Gold.6. Along with, argent, or silver it forms the two “metals” of heraldry – one of the guidelines of heraldic design is that silver objects should not be placed upon gold fields and vice versa 7. The yellow colour is often associated with the Sun, and the zodiacal sign of Leo.8.
The chief is an area across the top of the field 9. It appears in many different forms and can itself be charged with other charges and ordinaries, 10, being treated almost as if it were a completely separate area. In its simplest form it can be clearly identified. Early examples include the award by Henry III of England to the knight Robert de MORTEYN BRETON of Ermine, a chief gules.