OK

import java.awt.Color;
import java.awt.Dimension;

import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;
import javax.swing.SwingUtilities;
import javax.swing.border.Border;
import javax.swing.border.EtchedBorder;

import org.jdesktop.animation.timing.Animator;
import org.jdesktop.animation.timing.interpolation.PropertySetter;
import org.jdesktop.animation.timing.triggers.MouseTrigger;
import org.jdesktop.animation.timing.triggers.MouseTriggerEvent;

public class TimingSample7 {
    public TimingSample7() {
        JFrame frame = new JFrame("Timing Sample");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        
        JPanel panel = new JPanel();
        JLabel label = new JLabel("<html><h1>OK</h1></html>", JLabel.CENTER);
        label.setOpaque(true);
        label.setPreferredSize(new Dimension(200, 100));
        Border border = new EtchedBorder();
        label.setBorder(border);
        panel.add(label);

        Color orig = label.getBackground();
        Animator animator1 = PropertySetter.createAnimator(200, label, "background", 
                                                           orig, Color.LIGHT_GRAY);
        MouseTrigger.addTrigger(label, animator1, MouseTriggerEvent.ENTER);

        Animator animator2 = PropertySetter.createAnimator(200, label, "background", 
                                                           Color.LIGHT_GRAY, Color.BLUE);
        MouseTrigger.addTrigger(label, animator2, MouseTriggerEvent.PRESS);

        Animator animator3 = PropertySetter.createAnimator(200, label, "background", 
                                                           Color.BLUE, Color.LIGHT_GRAY);
        MouseTrigger.addTrigger(label, animator3, MouseTriggerEvent.RELEASE);

        Animator animator4 = PropertySetter.createAnimator(200, label, "background", 
                                                           Color.LIGHT_GRAY, orig);
        MouseTrigger.addTrigger(label, animator4, MouseTriggerEvent.EXIT);

        frame.add(panel);
        frame.setSize(new Dimension(400, 200));
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
                public void run() {
                    new TimingSample7();
                }
            });
    }
}