Visual Studios Dark theme for QtCreator.
Close QtCreator.
Download the files.
Put the .creatortheme file in Qt\Tools\QtCreator\share\qtcreator\themes and the .xml file in Qt\Tools\QtCreator\share\qtcreator\styles.
Start QtCreator and go to Tools->Options->Environment.
Set Color to RGB 102,102,102.
Select VisualStudioDark in the Theme drop-down.
Restart QtCreator.
Go to Tools->Options->Text Editor and select VisualStudioDark as Color Scheme.
Enjoy!