This repository contains themes for Qt Creator 2.6+.
For mac, the theme xml file has to be placed under /Applications/Qt Creator.app/Contents/Resources/styles/ (right click to Qt Creator.app and choose "Show Package Content")
For linux, under : ~/.config/Nokia/qtcreator/styles Create the folder if needed.
After that, launch QtCreator and got to the "Tools/Options" or "Preferences" under mac then go to "Text Editor" and select the new theme ;)