New style: Colossal Head (the link will not permanently change your selected stylesheet).
It is a replica of an Olmec sculpture, Colossal Head No. 4 (more info in PDF form), that is currently on display outside the Smithsonian Natural History Museum on the Constitution Avenue side. Noticed it on my way to the Federal Triangle station, and figured it would be fun to incorporate into the site.
I'm still trying to work out what colors look best.