http://www.colourlovers.com/web/blog/2010/03/11/calculating-color-contrast-for-legible-text
http://particletree.com/notebook/calculating-color-contrast-for-legible-text/
http://wufoo.com/
http://wufoo.com/2008/09/16/report-upgrades-and-new-graphs/
http://us2.php.net/manual/en/function.hexdec.php#74092
http://www.barelyfitz.com/
http://www.barelyfitz.com/projects/csscolor/
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