If two of the primary colors are mixed together, a secondary colour is created. As more colors are mixed, the selection of colors grows.
Additive secondary Colours
Secondary additive colours are produced by mixing two other additive primary colours together.
The additive primary colours are Red, Green and Blue.
When these additive colours are mixed, they produce three other secondary colours.
These are:
Cyan - Magenta - Yellow
If then these secondary colours are mixed, they produce what are called 'Tertiary Colours'
We use subtractive primary colours when we are mixing paints or inks. In the case of inks and printing, the colours used are Cyan, Magenta, Yellow and black. (CMYK for short)
Subtractive secondary Colours
Secondary subtractive colours are produced by mixing two other subtractive primary colours together.
The additive primary colours are Red, Green and Blue.
When these subtractive colours are mixed, they produce three other secondary colours.
These are: Violet/purple - Orange - green
If then these secondary colours are mixed, they produce what are called 'Tertiary Colours'