LibreTube/app/src/main/res/values/style.xml

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

    <style name="roundedImageViewRounded">
        <item name="cornerFamily">rounded</item>
        <item name="cornerSize">10%</item>
    </style>

    <style name="OLED">

        <item name="android:colorBackground">@color/black</item>
        <item name="colorSurface">@color/black</item>

        <item name="android:statusBarColor">@android:color/transparent</item>
        <item name="android:navigationBarColor">@android:color/transparent</item>

    </style>
</resources>