Change Color in Off state

There is a way to change color in off state?

<com.kyleduo.switchbutton.SwitchButton
	android:id="@+id/sb_tint_color_3"
	style="@style/SwitchButtonStyle"
	android:layout_width="wrap_content"
	android:layout_height="wrap_content"
	app:kswTintColor="@color/selector_color" />

select_color file is a simple color selector

<selector xmlns:android="http://schemas.android.com/apk/res/android">
    <item android:color="#ffcc0000" android:state_checked="true"/>
    <item android:color="#ff669900" android:state_checked="false" />
</selector>

But I continue to see only On-state color (red in this example) and I don't see off-color (green in this example).

Start by reproducing the issue with the SwitchButton XML and selector shown, then trace how the kswTintColor attribute handles checked and unchecked states. Done means the widget displays the red color when checked and the green color when unchecked.