To use these color themes with Xcode, copy them to your ~/Library/Developer/Xcode/UserData/FontAndColorThemes directory, and then select them from the Xcode → Preferences → Fonts → Colors window.
For more information on these color themes, see http://undefinedvalue.com/2015/02/01/monochrome-color-themes-xcode-and-sublime-text.
Amber
Green
Blue
Blueprint
daVinci
