I still dont get why they painted all the rings copper or whatever color that is.
Simple answer is that they wanted a unique color not available on other trims. Its good for marketing, especially when they named the color "Liquid Titanium".
They did also match it for some of the emblems, including the TrackHawk emblem in the back.
Personally I like the color they chose. At least in contrast to the color of my TrackHawk anyway. I thought about going with the black ones but I liked the copper tone against the Blue body, in fact, I liked it so much I had the wheels painted to match.
On our 2015 SRT, I replaced the grill rings with the black version, looked better with the stark contrast against the white Jeep.
So bottom line, its all opinion, and even then, opinion may change depending on the vehicle color and other accessories / themes.