It's times like this that I wish red still meant Socialist Democrat... That way, the Reds would be red.
Oh, and a bit of history here, if I can remember it correctly. When WWII was over, the Chinese Nationalists and Communists fought over the future of the country. At one point, they were to enter into a truce in a certain city. The Communists told the Nationalists to wear blue scarves, their traditional color. When the Commies came to town, they slaughtered anyone wearing blue. It rained that day, and many of the scarves dyed the necks of their wearers, too.
(BTW, if anyone knows more of the event, please chime in. I'm recalling it from a college course nearly 20 years back.)