GMAndroid/app/src/main/res/values/styles.xml

<resources>

    <!-- Application theme. -->
    <style name="AppTheme" parent="android:Theme.Material">
        <!-- All customizations that are NOT specific to a particular API-level can go here. -->
        <item name="android:textColorPrimary">#333333</item>
        <item name="android:windowBackground">@color/background_menu</item>
        <item name="android:colorBackground">@color/background_app</item>

        <item name="android:colorPrimary">@color/background_menu</item>
        <item name="android:colorPrimaryDark">@color/background_menu</item>
        <item name="android:colorAccent">@color/background_menu</item>

    </style>

</resources>