Primary colours cannot be created through the mixing of other colours. They are colours in their own right. The three primary colours are RED – YELLOW – BLUE.
Primary colours can be mixed together to produce SECONDARY COLOURS. Yellow + blue = green, Blue + red is purple, Red + yellow is orange.
An important rule of the colour wheel is that colours opposite to each other on the colour wheel usually work well together as a colour scheme. These are known as COMPLEMENTARY COLOURS.
Tertiary colours are the resulting colour formed when an equal amount of a primary and a secondary colour are mixed. The primary and secondary colour must be beside each other on the colour wheel. For example, a mixture of 50-percent red and 50-percent magenta would result in the tertiary colour of orange.