Hi Kris...
You're sort of like an Idea Generator. File this as another idea for a future release.
The color assignment capabilities of the software are a bit limited. You can't assign a color by whether or not a dimensions is driven by a relation. There are tools to show you which dimensions were manually created in drawing mode and which ones were created from the 3D model. There are tools to show you which dimensions are "faked", too. But there's no option to mark dimensions controlled by a parameter or relation.
Of course, I hate to say "no"... so here's something you can do to identify which dimensions are controlled by a relation. Go to Tools->Relations->Show->Info. The screen that pops up will list all dimensions controlled by relations. If you have relations buried deep within a sketch, the features with "sketched relations" will appear near the top of the report. From this report, you can click some of the blue hyperlinks and get detailed data about the relations and which dimensions are being controlled.
That's about the best we have for now... sorry it wasn't quite what you were looking for.
Thanks!
-Brian
