Colour coded bookmarks

It would be useful to be able to colour code bookmarks in a list, as aside from adding in a 'note for students' there's not really any way of emphasizing the importance of a particular bookmark in a list. For instance, I am currently editing a list where the academic has added asterisks onto the original word document to denote readings that are of particular use to students. There isn't currently any way to translate this into Talis, aside from grouping them in yet another section, but there are already so many of these in the list already. It might also help distinguish bookmarks from one another, as often there are no accompanying images of books for bookmarks, and the list can look a bit grey and same-y.