Found via Twitter: Ryan Lanciaux posted this awesome Theme Generator for Visual Studio…you give it 3 colors of your choice, and a contrast value, and it generates a theme with complementary colors for the various types of keywords and types, etc.
I used it to generate a Community Megaphone theme, with moderate contrast, and I find it pretty easy on the eyes. You can download the theme from the link below. Just click the attachment link below, then use the File menu to save the theme to your Visual Studio Settings folder. You can then go into Visual Studio and use Tools | Import and Export Settings (always back up your settings before applying new ones, so you can go back to your old settings if you want to) to import the new settings file.