A delightful dark theme for Xcode inspired by the Twilight theme for TextMate.
Menlo font version (font included in OS X)
$ curl -o ~/Library/Developer/Xcode/UserData/FontAndColorThemes/Twilight\ -\ Menlo.dvtcolortheme https://raw.githubusercontent.com/jetpackpilots/Twilight/master/Twilight%20-%20Menlo.dvtcolortheme
Input font version (font can be downloaded from The Font Bureau)
$ curl -o ~/Library/Developer/Xcode/UserData/FontAndColorThemes/Twilight\ -\ Input.dvtcolortheme https://raw.githubusercontent.com/jetpackpilots/Twilight/master/Twilight%20-%20Input.dvtcolortheme