title: How to change the color of an indefinite ProgressBar?
body: <p>I have a progressbar with the following style: <code>style="?android:attr/android:progressBarStyleSmall"</code> </p>
  
  <p>Sadly the bar is nearly white and in my case displayed on a white background.
  The progressbar is nearly invisible because of that.</p>
  
  <p>How can I change the color of the progressbar? A darker grey would be great.</p>