It is the default rendering clear color for the XNA Framework. Everyday, many budding game developers take their first steps into programming with this soothing blank screen: http://images.google.com/images?q=cornflower+blue+xna
Narrator: [voiceover] It must've been Tuesday. He was wearing his cornflower-blue tie.
If anyone's interested, here is my JS library with the code + color names that is used in this app: http://chir.ag/projects/ntc/