For the nav arrow you can use this to change the tintColor
<style name="CustomToolbarButtonNavigationStyle" parent="Widget.AppCompat.Toolbar.Button.Navigation">
<item name="android:tint">@color/red</item>
</style>
For the overflow button:
<style name="SampleActionOverflowButtonStyle" parent="Widget.AppCompat.ActionButton.Overflow">
<item name="android:tint">@color/red</item>
</style>
For the dropdown you can change: PTToolbarSwitcherButtonTheme
<style name="SampleToolbarSwitcherButtonTheme" parent="PTToolbarSwitcherButtonTheme">
<item name="textColor">@color/red</item>
<item name="iconColor">@color/red</item>
</style>
–
Result:
You can reference these values from the link mentioned before: