title: Bootstrap 3 .navbar-toggle toggled state
body: <p>I'm using bootstrap 3.0 and working on a mobile site.  I'm trying to figure out how to change the background colour of the button.navbar-toggle when the navbar has collapsed. </p>
  
  <p>Basically what I'm asking is how to show a 'pressed' state on mobile device when the navbar menu is opened?</p>