[Edit] here is an exemple of use of the notification popup I'm talking about:
Notifications.create().title(...).text(...).hideAfter(Duration).show();
in this case the notification popup follow the modena style (a little bit gray)
if we add dark style like this:
Notifications.create().darkStyle().title(...).text(...).hideAfter(Duration).show();
It's shown with dark color
So I just want to know if there is a way to change these default style, I already know about the notification pane and I am not talking about it.
So please I made my homework and did some research ... I found nothing that's why I here to find help