You can view the final interactive Flash version here:
On the way home last night I had the inspiration to add sorting to the culture menu. It works best when you have a region selected and than sort by colour. This allows you to easily see which colours are used the most and also collectively what each colour represents for each colour.
You can see an example of this here: http://lab.zoho.co.uk/lab/interactive-colours-in-culture/#/?region=western_american&sortOrder=desc&sortOn=colourLabel