Well, it looks like linen white to me. I wrote about the color of the universe in January, and frankly, I was disappointed in the green. However, there was a bug in the calculations. The universe is really off-white. A good painting color - I can see it now, Ralph Lauren's Cosmic Beige Interior One-coat Latex ... here is the chip:
The explanation is here: The Cosmic Spectrum. I think it's so cool these guys didn't have a problem admitting they screwed up and went to the trouble of fixing their web page and making a public announcement - a truly inspiring lack of that puncture-begging arrogance too many scientists nourish.