You can use a style for changing the color of progress like below
<style name="AppTheme.anyName">
<item name="colorAccent">YOUR_COLOR</item>
</style>
and use it in the ProgressBar like below
<ProgressBar
style="?android:attr/progressBarStyle"
android:theme="@style/AppTheme.WhiteAccent"
android:layout_width="wrap_content"
android:layout_height="wrap_content"
android:layout_marginBottom="@dimen/dimen_30"
/>
Hope it helps.