Using pattrstorage to change object's appearance

I'm using pattrstorage to store the states of a bunch of dial objects.

It would be super neat for useability if when I recall a preset, the dials that have changed change colour or something. I'm trying to think of an easy and elegant way to do that (I can probably think of something complicated and inelegant, but would rather not as there are a lot of dials!). Can anyone think of a clever way to do this? Is there any way to store or influence the appearance of dial (or other interface objects) using the pattr system itself?