http://www.paletton.com/

“Colors for data scientists. Generate and refine palettes of optimally distinct colors” http://tools.medialab.sciences-po.fr/iwanthue/

colour picker using the Munsell color system » http://colorusage.arc.nasa.gov/ColorTool_appletMac.html

http://devmag.org.za/2012/07/29/how-to-choose-colours-procedurally-algorithms/

https://news.ycombinator.com/item?id=6309989

“USING COLOR IN INFORMATION DISPLAY GRAPHICS” > http://colorusage.arc.nasa.gov/

http://www.colourlovers.com/blog/2007/09/19/the-7-wonders-of-the-food-coloring-world/

“preview a set of linear interpolated equidistant colors.” http://vis4.net/labs/185

Adobe's interactive, online colour-scheme picker > http://kuler.adobe.com/

“Why Programmers suck at Picking Colors” > http://www.betaversion.org/~stefano/linotype/news/108/