The name RGB stands for Red, Green, Blue, meaning that this system produces a colour as a mixture of three colours: red, green and blue. The numbers from 0 to 255 are used to indicate how much of each of these three colours is in the mixture. For instance, 255 0 0 is pure red, while 0 255 0 is pure green and 0 0 255 is pure blue. You might not think of them as the most typical red, green or blue, but here they are: