[Stratoscope]

No, you can set any CSS color if you have the minimum karma required. The linked page is just a list of colors that users have actually set.

I really wish any user could set a custom topcolor. I found the default orange hard on my eyes, and I was glad when I could change it.

Mine is #d0c8b5, which is simply a darker version of the page background color. Plain and unobtrusive, and the bit of orange in the "Y" logo sits nicely in the corner.

[pbhjpbhj]

And you can always use user.css to adjust per site CSS to your preference. I use it for a few sites; there are addons that facilitate it, but I've never bothered.