Indeed. Kudos to the author for stressing the point that there are colour blind (well, chromatically challenged) people out there. If I'd had a dime every time

Indeed. Kudos to the author for stressing the point that there are colour blind (well, chromatically challenged) people out there. If I'd had a dime every time I stared blankly at a data visualisation where accessibility hadn't been a consideration, I'd be sipping margaritas on my own private beach by now...