How to customize the back button on ActionBar

Question

I have been able to customize the action bar\'s background, logo image and text color using suggestions from these:
Android: How to change the ActionBar "Home"

Answer 1

If you are using Toolbar, you don't need those solutions. You only have to change the theme of the toolbar

app:theme="@style/ThemeOverlay.AppCompat.Light"

app:theme="@style/ThemeOverlay.AppCompat.Dark.ActionBar"

If you are using a dark.actionBar your back button is going to be white else if you are using light actionbar theme it is going to be black.