Dorky Poll: Favorite Wavelength

I have two labs today, and a lunch meeting, so no time for detailed blogging about science. It’s been a while since I did a Dorky Poll, though, so here’s one to keep people entertained while I’m working:

What’s your favorite color?

“What’s dorky about that?” you ask. You need to give your answer in wavelength units. For extra bonus dorky points, specify an atomic transition of approximately that wavelength.

Personally, I’m kind of partial to the blue-green lines in helium, right around 501 nm. That’s a nice color. The violet line in the hydrogen spectrum, around 435 nm, is also pretty good.

So what’s your favorite wavelength?