The default backgroud color for the snackbar in material design can be quite neutral. Of course it provides a lightweight feedback for the users. In same cases this kind of feedback, can to be too anonymous , and the user doesn't give it the right importance and attention . We are trying to use (not everywhere and not always) a colored snackbar, to highlight the type of message that we are showing. In this way the user can recognize a warning message for example. Ok... it is not material (or not?)... but the feedback from users is very good. And yes.. it remembers the styles used by Crouton. Here a simple gist .