A colour wheel or colour circle is an abstract illustrative organization of colour hues around a circle, which shows the relationships between primary colours, secondary colours, tertiary colours etc. The arrangement of colours around the colour circle is often considered to be in correspondence with the wavelengths of light, as opposed to hues, in accord with the original colour circle of Isaac Newton. Modern colour circles include the purples, however, between red and violet. Colour scientists and psychologists often use the additive primaries, red, green and blue; and often refer to their arrangement around a circle as a colour circle as opposed to a colour wheel.

Making a colour circle in photoshop is a royal PIA and more time consuming than I expected, life is too short, so I took my shots of crayons into the iPad and used an app which had an 8 segment template to drop a photo into each segment. Couldn’t find one with 6 or 12, which would have been more accurate, but you get the drift with this.
These are the crayons I keep for the grandkids to colour in with.