Watercolour Reference is an app for mobile devices designed to assist watercolour artists and painters, either beginners or the more advanced. This app assists the artist in the choice of appropriate colours and shades by providing data on individual colour characteristics and suggesting colour mixes/combinations for a variety of topics. Watercolour Reference currently uses the watercolour portfolios of Winsor & Newton and Daniel Smith. Included with this app are suggested combinations for portrait and flower painting plus a general watercolour characteristics database. Additional categories are available to purchase in-app.