Here is a theme that i crafted over the past few years from the original railscasts theme. I more cool reds blues and yellows desaturated that the browns and oranges from Ryans theme.
I not only do a ton of Ruby and Rails work, but a lot of UI work as well. So im in HTML JS and CSS quite a bit every day.
dl.dropbox.com/u/3105141/C2CDN/C ... ia.tmTheme
Enjoy. I hope people find it to be a help. If you like it... Pass it on.