For anyone curious: I ended up applying a style to the checkbox that overrides the colorAccent attribute to @android:color/black.

<style name="AppTheme.CheckBoxTheme" parent="@style/AppTheme">
    <item name="colorAccent">@android:color/black</item>
</style>

Then add this to the checkbox:

android:theme="@style/AppTheme.CheckBoxTheme"

Im currently trying to change the color of a checkbox shadow. However nothing seems to work.
I will just provide two images so you know what I mean.

I didn’t click the checkbox, but I holded it. I didn’t release “the click”. When I do this when the checkbox isnt checked everythings fine, but once its checked the shadows color changes to a different color. I want that color to be the same as the first one.

I tried changing various attributes:

    <CheckBox
        android_id="@+id/checkbox"
        android_layout_width="match_parent"
        android_layout_height="wrap_content"
        android_text="Sobald wie möglich"
        android_buttonTint="@android:color/black"
        android_foregroundTint="@android:color/black"
        android_shadowColor="@android:color/black"
        android_outlineAmbientShadowColor="@android:color/black"
        android_outlineSpotShadowColor="@android:color/black"
        android_checked="true" />

Nothing happens. I suppose that it might not be the shadow from the checkbox, since it looks pretty much the same when clicking any other view. Does anyone know how to fix this?