I am developing a QWizard but I have problems with the stylesheet.

I have this right now:

I have a QWizardPage that it is a QWidget, and it has a correct background color but the window is still white and I don't know how to change it.

Here is my launching code:

void MainWindow::on_actionOpen_wizard_triggered()
{
    WizardExample *wizard = new WizardExample();
    wizard->setAttribute(Qt::WA_DeleteOnClose);
    wizard->setStyleSheet("QWizard QWidget {background: #1A1A1D;}");
    wizard->show();
}

This "QWizard QWidget" is because if I don't put "QWidget" there, the result is:

I need to give stylesheet to all widgets in the wizard.

How can I fix it?? Which is the correct stylesheet for it?

Thank you very much!