1.	The painter's complementary colour based on subtractive primary colour and the RYB colour model, can be made by mixing yellow with purple, orange with blue, or red with green and it produces an equivalent gray.
2.	Since orange is complimentary colour of blue, A piece of yellow fabric placed on a blue background will appear as orange.
3.	When complementary colours are chosen based on the definition of light mixture, they are not the same as the primary colour.
4.	The digital colour management uses a hue circle of additive primary colour also known as the RGB colour model.
5.	The colorus in a computer monitor are additive mixtures of light.