White patterns are caused by many different genes, and combinations of these may result in more extreme expressions. A few examples are: frame, tobiano, sabino, splashed white and dominant white. White markings are usually included in the list.

Patterns can range from a few white hairs on the coat, to a completely white body, often with pink skin. The edges of the patterns can be round, straight, cornered or include vague ‘ticking’ / ‘roaning’.

Quite a few white patterns are caused by mutations on the KIT gene, or are expected to be found there. Examples are sabino1, dominant white, tobiano and possibly roan.

White patterns can appear on any coat colour, whether diluted, modified or neither. Grey is no exception to this. Remember, grey is a modifier which turns a coat grey as the horse ages. White patterns are white hairs which are often present from birth (though may increase in number later on). As a horse turns grey, the white patterns may become nearly invisible, but they are still there (as evidenced by the pink skin). The grey only masks the white.