ntfy-android/app/src/main/res/values/styles.xml

<resources>
    <!-- DayNight mode for easy dark mode, see https://material.io/develop/android/theming/dark -->
    <style name="AppTheme"  parent="Theme.MaterialComponents.DayNight.DarkActionBar">
        <item name="colorPrimary">@color/primaryColor</item>
        <item name="colorAccent">@color/primaryLightColor</item>
        <item name="actionBarStyle">@style/Custom.ActionBar</item>
        <item name="android:statusBarColor">@color/primaryColor</item>
        <item name="actionModeBackground">@color/primaryDarkColor</item>
    </style>

    <!-- Action bar color identical in dark mode, see https://stackoverflow.com/a/58368668/1440785 -->
    <style name="Custom.ActionBar" parent="Widget.MaterialComponents.Light.ActionBar.Solid">
        <item name="background">@color/primaryColor</item>
    </style>

    <!-- Rounded corners in images, see https://stackoverflow.com/a/61960983/1440785 -->
    <style name="roundedCornersImageView" parent="">
        <item name="cornerFamily">rounded</item>
        <item name="cornerSize">5dp</item>
    </style>
</resources>