I'd like that, too, but I'm not aware of a quick solution for it. If you click the style sheet name above the section of interest, you can view the actual style sheet as written, but that's an extra step (and can be quite a bit of scrolling if it's a long one...).

Someone has filed a request for this in the bug tracking system: 775135 – Add color type dropdown to rule and computed views. Although it's not constructive to add "me too" comments, if you register for Bugzilla, you can add your vote to add this feature (next to Importance).