title: Android versions lower than API Level 21 using appcompat
body: <p>In the following code, <code>android:progressTint="#c9c9c9"</code>,  <code>android:secondaryProgressTint="#bebebe"</code> and <code>android:thumbTint="#a9a9a9"</code> are API Level 21 features. However, I am currently using <code>com.android.support:appcompat-v7:23.1.1</code>. Will my app run on devices lower than API 21?</p>
  
  <pre><code>            &lt;SeekBar
                  android:id="@+id/teacher_intro_seekbar"
                  android:layout_width="fill_parent"
                  android:layout_height="wrap_content"
                  android:layout_margin="5dp"
                  android:progress="10"
                  android:paddingRight="10dp"
                  android:progressTint="#c9c9c9"
                  android:secondaryProgressTint="#bebebe"
                  android:thumbTint="#a9a9a9" /&gt;
  </code></pre>