Colour Palette Generation

I’m looking at colour palette generation for paintr and draw-something.

Various mathematical systems:

http://www.math.yorku.ca/SCS/sasmac/brewerpal.html

http://www.telecable.es/personales/alberto9/color/index.htm

http://www.sonosphere.com/WebTools/ColorPaletteGenerator/

http://www.colorcache.com/colorpicker.shtml

The usual colour-wheel oriented schemes, plus a scheme that seems based on swapping the RGB values, and a map colouring system I haven’t figured out yet.

And there’s also many image palette extractors, such as the one at praystation I can’t find just now.

Paintr could use other flickr images for colours, but that would remove the folksonomy element.