Sharing Color (Material?) parameters across multiple shapes?

Is there a workflow currently that supports being able to en-masse change the color of many shapes all at once?

Use case example, X# shapes assets form the UI, and we want to change all of a subset of shapes assets' to another color, either in editor or even at runtime. 

For other assets, we'd alter the material the shapes asset is using, but materials don't appear to be exposed on shape assets anywhere that I could find. 

Its extra work but I could write a manager component that holds a reference to all the shape assets in arrays and assign to their colors collectively that way, but before writing that solution, is there some stock way to do what I am intending to do?