How do I override the color of a group (overide by UniqueId)? I know how to overwrite elements, but the problem is that the elements in groups have the same Id. Therefore I need need to use the UniqueId, but how?
It looks to me that you need to research your problem better / define what you need better. Neither group instances nor the elements inside those instances have identical IDs (that’s kind of the whole points of IDs/GUIDs).
Are you possibly trying to color the elements of each group instance differently, based on their group type?
I think I made this more difficult than it really was. Thank you.