RE: The reason for the non-mopar colors
Point of fact, the auto industry has offered cars in primmer. Dodge in fact did with the '68 Hemi Darts - though admittedly not aimed for "street use".
I too agree, it is unlikely they or any automaker would do in Primmer, but perhaps the Challenger S/S version??
On top of all this, I was surprised to learn the most popular American car color is brown/dark tan... A lot of folks out there who just drive vehicles from point A to Point B...Ugh