Most of the advice on how to make a chart readable for the colourblind also helps keep it intelligible when converted to greyscale. Unless colour is vital to c

Most of the advice on how to make a chart readable for the colourblind also helps keep it intelligible when converted to greyscale. Unless colour is vital to communicating something with a chart, I always check to make sure it's still understandable in greyscale. Old habit from the days of B&W laser printers and copy machines, but it hasn't done me wrong yet.