Visual way to differentiate between types of updates via menubar icon

It would be great to have a way to quickly differentiate between updates via the menubar icon (or even dock, but currently notifications appear via the menubar icon). Maybe using different colors i.e. the blue color that we currently use for new tweets and different colors for Mentions and DMs. It would allow the user to quickly glance at the menubar or dock icon and be able to tell if the user was mentioned in a tweet or merely had some friends update in the timeline.