Space Invaders Are Here

I wonder why people began imagining that space invaders were green. Perhaps it was because humans had already appropriated most of the other colors: black, white, khaki, red, yellow, and blue. The ancient Brits painted their naked bodies blue with woad, so they say, but that was before football fans started painting themselves in the colors of their teams. Now you can see green people rooting for Brazil, but they have a yellow stripe also.