Is there a way to customize the background theme for Workspace Control windows?

Hi, I’ve got a QGroupBox that is wrapped inside a workspaceControl window and I’m trying to change the color and opacity of it but I’m not sure if it supports that kind of customization.

Does anyone know if there is a way to do that please?

def run():
    workspaceControlName = 'MyDockableWindow'

    # Delete existing window if it already exists
    if cmds.workspaceControl(workspaceControlName, q=True, exists=True):
        cmds.deleteUI(workspaceControlName)

    # Create the workspace control
    workspace_control = cmds.workspaceControl(
        workspaceControlName,
        label='My Dockable Window',
        floating=False,
        retain=False
    )

    # Get the workspace control's underlying QWidget using Maya API
    control_widget = omui.MQtUtil.findControl(workspaceControlName)
    control_wrap = wrapInstance(int(control_widget), QtWidgets.QWidget)

    # Ensure the workspace control background is transparent
    control_wrap.setAttribute(QtCore.Qt.WA_TranslucentBackground)
    control_wrap.setWindowFlags(control_wrap.windowFlags() | QtCore.Qt.FramelessWindowHint)
    
    # Set the stylesheet with the transparent background and border-radius
    control_wrap.setStyleSheet("""
        QWidget {
            border-radius: 0px;
            background-color: rgba(46, 46, 46, 179);
        }
    """)

    # Create an instance of the main widget and add it to the control
    main_widget = MainWidget(parent=control_wrap)

    # Set a layout if not already set
    if not control_wrap.layout():
        control_wrap.setLayout(QtWidgets.QVBoxLayout())

    # Add the main widget to the workspace control layout
    control_wrap.layout().addWidget(main_widget)

    print("Main widget shown in workspace control")

if __name__ == "__main__":
    run()