http://labs.ideeinc.com/multicolr/
They extracted the colours from 10 million of the most “interesting” Creative Commons images on Flickr. Using their visual similarity technology you can navigate the collection by colour…
What’s really cool is that you can have a selection of colours in your search criteria – what a great tool for any artist!
Feel free to send me your best “palette”… here is an image I found searching six colours…