title: Indeterminate circle progress bar on android is white, despite colorAccent color
body: <p>I'm unable to figure out how to change the color of the indeterminate circle progress bar on API-21. I've made sure that my colorAccent is set correctly. My understanding is that the system should take from colorAccent and tint the ProgressBar accordingly. Any idea what could be going wrong?</p>
  
  <p>app/src/main/res/layout-v21/fragment_story_comments.xml</p>
  
  <pre><code>&lt;ProgressBar
          android:id="@+id/progress_bar"
          android:layout_width="wrap_content"
          android:layout_height="wrap_content"
          android:layout_centerInParent="true"
          android:visibility="visible"/&gt;
  </code></pre>
  
  <p>app/src/main/res/values/themes.xml</p>
  
  <pre><code>&lt;style name="AppTheme.Base" parent="Theme.AppCompat.NoActionBar"&gt;
      &lt;item name="colorPrimary"&gt;@color/colorPrimary&lt;/item&gt;
      &lt;item name="colorPrimaryDark"&gt;@color/colorPrimaryDark&lt;/item&gt;
      &lt;item name="colorAccent"&gt;@color/colorAccent&lt;/item&gt;
      &lt;item name="android:windowNoTitle"&gt;true&lt;/item&gt;
  &lt;/style&gt;
  </code></pre>
  
  <p>app/src/main/res/values/colors.xml</p>
  
  <pre><code>&lt;color name="colorAccent"&gt;#ff5722&lt;/color&gt;
  &lt;color name="colorPrimary"&gt;#ff5722&lt;/color&gt;
  &lt;color name="colorPrimaryDark"&gt;#e64a19&lt;/color&gt;
  </code></pre>