XML : android:textColor in action bar style not working

I have my resources file, trying to change the styling on the action bar, but my code below won't change the color of the text. What am I doing wrong?

  <?xml version="1.0" encoding="utf-8"?>  <resources>      <style name="AppTheme" parent="android:Theme.Material.Light">          <item name="android:textColor">@color/white</item>          <item name="android:colorPrimary">@color/purple</item>        </style>  </resources>