The spectrum of colours are:
Red, orange, yellow, green, blue and violet
The primary of colours are: Red, blue and yellow
The secondary are colours are: Green, orange and violet
Rules of the Colour Star:
The colour star can be divided into warm and cool colours.
Colours that are opposite each other on the colour star will neutralise each other. These are known as opposite colours.
The principle of opposite colours is used in hairdressing when dealing with colour correction - e.g. if the hair is too yellow, violet is used to reduce the yellow tone. Red is used to neutralise a green tone.