Change ActionBar color - Xamarin

I did in this way. Try this and let me know if it works please,

<style name="AppTheme" parent="android:Theme.Holo.Light">
    <item name="android:actionBarStyle">@style/ActionBarTheme</item>
</style>

<style name="ActionBarTheme" parent="android:Widget.Holo.Light.ActionBar.Solid.Inverse">
    <item name="android:background">@color/color_action_bar</item>
</style> "

And in colors.xml or add color variable in strings.xml, please add your desired color for the action bar

<color name="color_action_bar">#3450A3</color>

And mention the theme in the manifest file

<application
    android:theme="@style/AppTheme" >