There were actually only two factory orange colors; Race Hemi Orange (used on any engine painted orange from 1962-1968) which was a pale pumkin orange, and Street Hemi Orange, a more reddish shade of orange which was intended to be used on any engine painted orange from 1969-1971, there may have been some late 68 engines that recieved the Street Hemi Orange color.

Any other shade variables people have come up with over the years have simply been to slight shade variations between batches of paint.