Colour knowledge by Easy Peasy Art SchoolArtists need to know their colours. If you would like to be an artist you need to know all about how colours are made by mixing colours together. Colours are often displayed on a COLOUR WHEEL to show how they are related. Primary colours are the building blocks of all colours. From these three colours, along with white and black, we can make just about all the colours we can think of by mixing them together in different amounts.