Red, Green, and Blue are socket colors that you will encounter all the time but white sockets can be found on some unique and corrupted items. Where are you even finding these?

Pretty sure its still not allowed though since it's sending multiple chat messages. The issue is that making party play "less detrimental" just means solo play becomes worse off than group play and now you have solo players who feel like they're getting the raw end of the stick because they don't want to play with other people. You can switch back and forth until you're satisfied with your filter.

Show Brass Maul. This way you can check out some other filters, get inspiration and question their weird color choices.