SQL Server Management Studio Skin / Appearance / Layout
I decided to try something simple on SSMS 2012:
- Go to http://studiostyl.es/
- Pick a theme and download it
- Follow these screenshot instructions
Note that doing this will only affect the theme of the text editor, not the toolbar, menu, object explorer window, etc.
SSMS 2012 is build on the VS 2010 shell. Thus, it can use compatible ".vssettings" files to apply custom color schemes.
See also http://studiostyl.es/ for a gallery.