Shahee Ilyas has lots of fun and interesting projects on his site. One I found particularly interesting was a breakdown of all the flag colors in the world and how much each color is used in each flag.
With his permission here they are:

Each sector the pie-chart is proportional to the area of the color on the respective flag

Click on an Image to Reveal the Country Flag

All Flag Colors Combined

Using a list of countries generated by The World Factbook database, flags of countries fetched from Wikipedia (as of 26th May 2007) are analyzed by a custom made python script to calculate the proportions of colors on each of them. That is then translated on to a piechart using another python script. The proportions of colors on all unique flags are used to finally generate a piechart of proportions of colors for all the flags combined. (note: colors making up less than 1% may not appear)

Originaly Created By Shahee Ilyas 2007 | This work is licensed under a Creative Commons Attribution 3.0 License. Special thanks to Ayesh. All original flags are from Wikipedia contributors. Some information is obtained from other public domain sources such as The World Factbook database.