== Link: Using colour well in data visualization [[Why Should Engineers and Scientists Be Worried About Color? http://www.research.ibm.com/people/l/lloydt/color/color.HTM]] is about how straightforward use of colour in data visualizations can mislead you and hide information (and how to do better). Some of their examples are eye-opening and alarming. (Via [[Hacker News http://news.ycombinator.com/]].) (Since I took up [[photography http://cks.mef.org/space/rtblog/photography/]] I've had a much increased interest in how we perceive things, including colour.)