The main device (symbol) in the Lillington blazon is the chequy . 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.
Chequy (a word with a surprising number of different spellings!) is what is known as a treatment, a repeating pattern usually used to fill the whole background of the shield with a series of alternately coloured squares 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Chequy. These squares are usually quite small (there should be at least 20 in total), giving the appearance of a chess board, but any combination of colours may be used. It can also be used as a patterning on some of the larger ordinaries, such as the pale and fess, in which case there are three rows of squares. Wade, an authority on heraldic meaning groups chequy with all those heraldic features that are composed of squares and believes that they represent “Constancy”, but also quotes another author Morgan, who says that they can also be associated with “wisdom…verity, probity…and equity”, and offers in evidence the existence of the common English saying that an honest man is a ”Square Dealer” 7The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P100.