Sometimes more creative colors have been offered, and been discontinued, apparently because people weren't buying enough of them. Several years ago, for example, one of the colors you could get a Dodge truck in was purple (not very dark but not very bright). It's no longer offered, and I haven't seen any. A type of car I was interested in was also available in orange, but isn't anymore, and I haven't seen any (although in that case I admit I didn't like the shade of orange they were offering, so I can understand).

What I don't get is why they discontinue colors that seem to be popular. The PT Cruiser palate originally included a dark purple, and lots of them on the road now have that color, but you can't get a new one in that color anymore. (...although you can get one in a loud shade of blue.) And Chevy & GMC pickup trucks in the late 1990s often came in a darkish but shiny bronze color, but over the years the company starting making it lighter, more yellow/beige and less brown, and then decreasing the saturation so it was paler and less of an intense stand-out yellow and more of a wussified sandy or pine-woody color that blends in with all of the white, off-white, and beige cars. You'd never imagine a connection now with the original bronze if you hadn't been watching the evolution over the years.