title: Android - CardView elevation shadow make darker
body: <p>I am using <code>'com.android.support:cardview-v7:23.4.0'</code> and I see the shadow but is not a dark grey shadow, and I would like to get a darker elevation shadow, but I do not see any attribute to get it, any ideas?</p>
  
  <pre><code>    &lt;android.support.v7.widget.CardView
          android:layout_width="match_parent"
          android:layout_height="wrap_content"
          android:layout_marginTop="8dp"
          android:layout_marginRight="8dp"
          android:layout_marginLeft="8dp"
          android:layout_marginBottom="8dp"
          app:cardElevation="8dp"
          app:cardPreventCornerOverlap="false"
          app:cardCornerRadius="1dp"
          app:cardUseCompatPadding="false"&gt;
          &lt;include layout="@layout/any_layout"/&gt;
      &lt;/android.support.v7.widget.CardView&gt;
  </code></pre>