In my color selection, I want to create a rule that eliminates possible color combinations.
I.e. If I have one part as blue, then the next parts options can only be white or black, and not green.
Thank you for your question. In order to do this I have made a simple example which you can find in the atachment below. What this shows is how to check active options and filter a matgroup as a result. This limits the amount of choices based on a previous selection of the user. you can also combine this with a Select option node to select a option base don a previous selection.
I hope this explains it, if not please let us know!