Hatching is a conventional system for monochrome denotation of heraldic armory, whereby the tinctures (colours) are represented by dots and lines. This technique is employed in cases where colours, for either aesthetic, practical or economic reasons are not reproduced – e.g. on surfaces such as woodcuts or engravings, seals and coins.

Tincture is the limited palette of colours and patterns used in heraldry. The need to define, depict, and correctly blazon the various tinctures is one of the most important aspects of heraldic art and design.