<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>

        <item name="drawerArrowStyle">@style/DrawerStyle</item>
        <item name="titleTextColor">@color/title_color</item>

        <item name="colorPrimary">@color/primary_color</item>
        <item name="colorPrimaryDark">@color/primary_dark_color</item>
        <item name="colorAccent">@color/accent_color</item>
    </style>

    <style name="DrawerStyle" parent="Widget.AppCompat.DrawerArrowToggle">
        <item name="color">@color/title_color</item>
    </style>

    <style name="Divider">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">1dp</item>
        <item name="android:background">?android:attr/listDivider</item>
    </style>

    <style name="Shadow">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">5dp</item>
        <item name="android:background">@drawable/shadow</item>
    </style>

</resources>

<resources>

    <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="preferenceTheme">@style/PreferenceThemeOverlay</item>

        <item name="colorControlNormal">@color/title_color</item>
        <item name="drawerArrowStyle">@style/DrawerStyle</item>
        <item name="titleTextColor">@color/title_color</item>

        <item name="colorPrimary">@color/primary_color</item>
        <item name="colorPrimaryDark">@color/primary_dark_color</item>
        <item name="colorAccent">@color/accent_color</item>
    </style>

    <style name="DrawerStyle" parent="Widget.AppCompat.DrawerArrowToggle">
        <item name="color">@color/title_color</item>
    </style>

    <style name="Divider">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">1dp</item>
        <item name="android:background">?android:attr/listDivider</item>
    </style>

    <style name="Shadow">
        <item name="android:layout_width">match_parent</item>
        <item name="android:layout_height">5dp</item>
        <item name="android:background">@drawable/shadow</item>
    </style>

</resources>

Fix back button color in subscreens
Fix back button color in subscreens
