For reference, here's a demo of google's buttons implemented in polymer: <a href="http://www.polymer-project.org/components/paper-elements/demo.html#paper-button" rel="nofollow">http://www.polymer-project.org/components/paper-elements/dem...</a><p>Note that google's appear to have a soft gradient and respond to the length of time for which the button is pressed. IMO this creates a less-jarring effect.