QtCreator Visual Studio Dark X Theme
If you like this theme, you can use it for free appreciate )
xcopy VisualStudioDarkX.xml %APPDATA%\QtProject\qtcreator\styles
cp VisualStudioDarkX.xml ~/.config/QtProject/qtcreator/styles/
sh ./install.sh
alternative
cp VisualStudioDarkX.xml ~/.config/QtProject/qtcreator/styles/