I’m a dark theme user since 2007. I really can’t imagine having used a light theme *sigh*. Please stop! Its all about customization on my desktops DEV tools. VIM, Visual Studio 2008 and 2010, WING, Eclipse, SharpDevelop, Notepad++ … There are plenty of options to tweak the colors to your liking.
Basics
Color theory is really helpfull for getting started with color customizing your tools. The color wheel did a great job in reflecting my knowledge on colors. My themes are currently build upon 4 colors and 5 gray scales, currently using 2 to 3 of theme having a total of 7 different tones.
Have a look at the color table where I’m using the colors:
You can find the kuler color profiles from the pictures above at http://kuler.adobe.com/#themes/search?term=schuster-rainer and the color schemes at https://github.com/schuster-rainer/themes
Screenshots
VS2010
XAML, HTML (XML looks like the others)

C#, IronPython
F#
Import for color scheme “Tools->Import and Export Settings …”
Import for Expression Dark Like VS2010 Theme - Theme AddIn needed “Theme –> Customize Colors –> Import Theme”
VIM
Boo,Clojure
Python, Ruby
Installation according to your configuration - %userprofile%\vimfiles\colors - syntax files needed for the different languages
SharpDevelop 3
Boo
Installation: %userprofile%\AppData\Roaming\ICSharpCode\SharpDevelop3.0\modes\
WING, Powershell
Future enhancements:
- more languages for SharpDevelop 3 and 4
- VS2008 and VS2010 (some tweaks, especially VB settings)
- a scheme for Aptana
- uhh I totally forgot Notepad++