Yes, I think their choice of stainless matches well ... it certainly adds a nice, finishing accent to the back of the vehicle.Looks pretty terrific! One thing i was worried about was the finish matching the other accent pieces but it looks like it does match well.
P.S. The trailer hitch is a carryover from my recent Prius days ... an attempt to keep people (parallel parkers, etc.) off my rear. Fat lot of good it did when a young lady took an abrupt left turn and wiped out the front end. Hence, the CX-3 ... with all its collision avoidence gear ;-)