Color wheel
The color wheel most commonly used today is called the HSV color wheel which means hue, saturation, value.  The digital form of the HSV color wheel is called the RGB color wheel (shown below).  The HSV/RGB color wheel is described below.  There are two versions: one in which red, green and blue are regarded as the primary colors (called the electronic or computer color wheel); and one in which magenta, yellow, and cyan are regarded as the primary colors (called the printer's color wheel).the primary colours are on the top.