packages/SysuiDarkThemeOverlay/res/values/themes_device_defaults.xml

<?xml version="1.0" encoding="utf-8"?>
<resources>
    <!-- Dark theme for a window that should look like the Settings app.  -->
    <style name="Theme.DeviceDefault.QuickSettings" parent="android:Theme.DeviceDefault">
        <!-- Color palette -->
        <item name="android:colorPrimary">@*android:color/primary_device_default_settings</item>
        <item name="android:colorPrimaryDark">@*android:color/primary_dark_device_default_settings</item>
        <item name="android:textColorPrimaryInverse">@*android:color/primary_text_material_light</item>
        <item name="android:textColorSecondaryInverse">@*android:color/secondary_text_material_light</item>
        <item name="android:colorSecondary">@*android:color/secondary_device_default_settings</item>
        <item name="android:colorAccent">@*android:color/accent_device_default_dark</item>
        <item name="android:colorControlNormal">?android:attr/textColorPrimary</item>
        <item name="android:colorBackgroundFloating">#000</item>
    </style>
</resources>