such as pewter (I know not a pure grey, but popular), titanium (my Mazda3), and the 450's shade of grey was probably close to a 'medium' shade. To be honest, I like it because it hides dirt the best (between washes), is usually light enough to not absorb as much heat and shine's up real well when polished. I could see a silver tridion with some medium shade of grey combo as being pretty popular . . .