.DVTCOLORTHEME File Extension
What is a DVTCOLORTHEME file?
Color theme file used by Apple Xcode, an iOS and Mac OS X application development program; structured similar to a .PLIST file, formatted in XML; contains data that describes the color theme of the code editor; includes text color, text font, and text background color.
In order to select your theme, you must place your DVTCOLORTHEME file in the ~/Library/Developer/Xcode/UserData/FontandColorThemes directory. If the "FontandColorThemes" folder doesn't exist yet, simply create that folder and restart Xcode. Then, you can select your color theme in the application. Select Xcode → Preferences..., choose "Fonts & Colors, and select your theme.
NOTE: In Xcode 4, DVTCOLORTHEME files replaced .XCCOLORTHEME files.