Hacker News: Top Colors
news.ycombinator.com
news.ycombinator.com
Worth noting that if you really care and have less than 250 karma, you could always install GreaseMonkey and change it (and other things) yourself...
Your lighter brown is nice too, that said.
Edit: Gonna try your light beige for a little while...
Edit 2: Aha, the currently selected link (e.g. new, threads, etc) becomes almost invisible on this light beige... it's still visible on my darker brown! :-)