Throughout the black-and-white photography era, people added colour to photographs and film by hand-tinting them with paint and ink. However, the development of true colour photography required a scientific understanding of how humans perceive colour. In 1850, German physicist Hermann von Helmholtz developed the trichromatic theory of vision, which postulated that the human eye contained three different kinds of light receptors - today known as cone cells - each sensitive to one of three colours: red, blue, and green. In 1861, English photographer Thomas Sutton, working with Scottish physicist James Clerk Maxwell, applied Helmholtz’s theories to create history’s first colour photograph. Sutton took three separate photographs of a tartan ribbon through a red, blue, and green filter, then converted these photographs into slides and projected them back through their respective filters, the three slides combining to create a full colour photograph. Though this image could not be fixed on a physical medium, Maxwell’s demonstration nonetheless pioneered the additive colour process, which would form the basis of colour photography for the next few decades.

Shortly after Sutton’s experiment, French physicist...

Author: Gilles Messier

Editor: Daven Hiskey

Producer: Caden Nielsen

Host: Simon Whistler