iiab-tools/apk/controller/app/src/main/res/values/themes.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <style name="Theme.IIABController" parent="Theme.AppCompat.Light.NoActionBar">
        <item name="colorPrimary">@color/colorPrimary</item>
        <item name="colorPrimaryDark">@color/colorPrimaryDark</item>
        <item name="colorAccent">@color/colorAccent</item>

        <item name="android:windowBackground">@color/white</item>
        <item name="android:textColorPrimary">@color/black</item>

        <item name="sectionBackground">@color/section_body_bg_light</item>
        <item name="sectionHeaderBackground">@color/section_header_bg</item>
    </style>
    <style name="Theme.TransparentQR" parent="Theme.AppCompat.NoActionBar">
        <item name="android:windowIsTranslucent">true</item>
        <item name="android:windowBackground">@android:color/transparent</item>
        <item name="android:windowNoTitle">true</item>
        <item name="android:backgroundDimEnabled">false</item>
    </style>
</resources>