We now know that each pixel in an image gets its colour from a combination of Red, Green, and Blue.

With 24 bit colour, there are 8 bits available for each of the three channels: red, green and blue. With 8 bits we can have 256 (2 to the power of 8) different values.

We have seen how pure Red can be specified as [255, 0, 0]; black (the absence of light) as [0,0,0]; and white as [255,255,255].

Use the sliders on the right to explore the ways in which the three channel colours combine.

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