Troy Sobotka has published a series of articles on digital colour, covering a wide range of topics from 'what is an RGB value?' to 'what is a linear color space'? Be prepared for some intense reading.
Ever wonder just what is happening when you are pushing pixels around? This is a series of articles to help you, the image maker, survive in a world full of bulls*it regarding digital colour. If you are confused about digital colour, it’s not your fault.