[Koha] Customize OPAC search results

Hi all, my first message here. We have been starting tu use Koha in our school for organize our books, it works very well. I'd like to know if it is possible to customize the search results and put a circle with a color side to each book, based on class that it suited for For instance, first class --> BLU, second class --> RED, and so on Do you have any hint? Thanks Daniele