android/app/src/main/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.DarkActionBar">
        <item name="android:actionBarStyle">@style/SyncslidesActionBar</item>
        
        <!-- Support library compatibility -->
        <item name="actionBarStyle">@style/SyncslidesActionBar</item>
    </style>

    <style name="ThemeToolbar" parent="AppTheme">
        <!-- Navigation icon color -->
        <item name="colorControlNormal">@color/action_orange</item>
    </style>

    <!-- ActionBar styles -->
    <style name="SyncslidesActionBar"
        parent="@style/Widget.AppCompat.Light.ActionBar.Solid.Inverse">
        <item name="android:background">@color/toolbar_gray</item>

        <!-- Support library compatibility -->
        <item name="background">@color/toolbar_gray</item>
    </style>

</resources>