"We divided dreams into different 'colors'," said Dr. Noam Downey, a researcher with the Fyre Sygn Slumber Mill, a group that does extensive dream experiments. "'Red' ideas in dreams are related to personal experiences, like flying. 'Blue' ideas are religious, 'Green' ideas are political, and so on," explained Dr. Downey.

"We then compared the subject's endochrine emissions while dreaming with their awakened emotional states -- happy, sad, angry -- and tried to match up their dream-color with the corresponding emotion."

"Curious - 'green' ideas sleep furiously."