Nope, it's not a misremembered Discworld novel, it's a very cool video I saw this morning on Chris Schmidt's twitter feed, which I thought could do with an outing here as well for anyone who hasn't seen it, because it's nice to get a well-informed and explained reminder of the basics. So please sit back and enjoy this fascinating video on basic colour theory by Captain Disillusion over on YouTube. Also some particularly nice explainer graphics of the sort that us 4D types should find quite rewarding...
CBR