Pink, Magenta, Purple, and Atomic Revealed As Possible New Zune HD ColorsS

We had a tiny picture showing Zune HD color options a while back. Now we've got the source code revealing the names of 'em. I can't tell eggshell from off-white, so could someone please tell me what "atomic" is?

Apparently the Zune software source files had those four pictures hidden along with their corresponding names: pink, magenta, purple, and atomic. It's anyone's guess what other color options might be lurking in the code. I'm hoping for Burning the Midnight Oil Blue. [Cruel World's Lifestream via Engadget]