No, that's right, though I think of it as off-white rather than tan. Strictly accurate Nats colors might not make for the best readability, and a pure white background would be needlessly hard on the eyes in addition to slightly more costly energy-wise.
All of that said, I will certainly be experimenting with many possibilities when I re-skin the 2.0 theme. I'm sure I'll seek feedback from everyone here.
energy savings? You using a CRT?