Everything you see on a screen is created by colours. I know that’s obvious. What else would it be. But think of a film or a photograph. All the different colours, tones and shades; as many as your eye can see. (But more about that another time.
The sketch above shows a linear spectrum of colours; Red, to Yellow, to Green, to Blue, to Pink and back again.
Digital Colour – Introduction to Hue, Saturation and Lightness
