"Ancient Maya would paint unlucky people blue and throw them down a sacred well as human sacrifices. Now scientists have solved the mystery of how to make the famous blue pigment by analyzing traces on pottery left in the bottom of the well.

The Maya associated the color blue with their rain deities. When they offered sacrifices to the god Chaak, they would paint them blue in hopes he would send rain to make corn grow. The blue paint has been found on objects for a long time, but scientists have debated how the Maya created the pigment. "

http://www.livescience.com//history/080226-maya-blue.html


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