how to change the color of a menubar in java

public class BackgroundMenuBar extends JMenuBar {
    Color bgColor=Color.WHITE;

    public void setColor(Color color) {
        bgColor=color;
    }

    @Override
    protected void paintComponent(Graphics g) {
        super.paintComponent(g);
        Graphics2D g2d = (Graphics2D) g;
        g2d.setColor(bgColor);
        g2d.fillRect(0, 0, getWidth() - 1, getHeight() - 1);

    }
}