This is the One Monokai theme for Qt Creator 4+.

It is based on One Monokai for Visual Studio Code, which is a cross between Monokai and One Dark.

Monokai was created by Wimer Hazenberg in 2006 for Textmate.

One Dark was created by Github in 2014 for Atom.

• Find your QT Creator installation folder. That's were you install the application theme, because it's a non-configurable application ressource. If you installed Creator together with Qt it's: ~/Qt/Tools/QtCreator/share/qtcreator/

• Install the application color-theme (*.creatortheme) to QtCreator/share/qtcreator/themes/

  • Windows: xcopy -Y one-monokai.creatortheme C:\Qt\Tools\QtCreator\share\qtcreator\themes\
  • Linux | Mac: cp one-monokai.creatortheme ~/Qt/Tools/QtCreator/share/qtcreator/themes

• Find your Qt Creator config folder. That's were you install the syntax color-scheme, because you want it to be editable.
• Install the syntax-highlighting color-scheme (*.xml) to qtcreator\styles
  • Windows: xcopy -Y one-monokai.xml "%APPDATA%\QtProject\qtcreator\styles\"
  • Linux | Mac: cp one-monokai.xml ~/.config/QtProject/qtcreator/styles/

• Go to Qt Creator -> Tools -> Options > Environment, then in the Tab Interface select Theme: One Monokai