The scientist James Clerck Maxwell discovered the additive colour system and showed the first colour photography. He lived in the 19th Century, influenced by the Works of Isaac Newton and Thomas Young. He has impact on our knowledge of the Saturn Rings, Electromagnetic waves and the RGB colours.
Maxwell at Trinity College, Cambridge. He is holding one of his colour wheels.
In his student years at the Cambridge he was fascinated by the questions:
What are colours? Why do we perceive colour? And why are we so coloured?
At that time he read the studies of Thomas Young. Young thought that painters have a much better understanding of colours then scientist had at that time. They used the primary colours to get the full colour spectrum of a painting. He found that there’s a significance of these three primary colours and that biology has a role to play. He assumed there are three receptors for each of the primary colours in the human brain. By mixing these we receive our full colour view.
Maxwell read about this theory and wanted to prove it by mathematics. He developed a tool to trick the human brain. By spinning the right amounts of red, green and blue on a wheel, it seems like the colours are melting together to white. With this experiment he could prove that what we perceive as white is actually a mix of colours. And that there’s a difference of mixing colours in light and colours in pigments.
From this he developed a Red, Green and Blue colour pyramid. On each corner there is the absolute of one of the primary colours. Towards the middle you get different hues of the colour and the center is white. The Pyramid is built on a x/y Axe. Mapping out a point on the pyramid gives a value of each of the primary colours.
To display his finds, he was invited to give a lecture on colour vision. What he did was to screen the same photograph with a red then green and blue light on top of each other. Where the colours intersect, there is white.
At this time there was only black and white photography. With this experiment he made the world’s first colour photography. The additive colour system can be understood as the foundation of RGB colours and is used in the screens of most electronic devices today.
