In the color chip charts in Hamtramck Historical, no chip charts for 1960, but there are for 1961. In most cases, that year, the color names listed on the charts might be the actual "sales names" for the colors. In most cases, there is a note that the interior colors and formulas, ARE the same as the outside colors, with a footnote that the suffix on the paint code means "Semi-Gloss" paint with a specified "flattening agent" added to the formula, in a specified amount.
No listings for "Chryslers" specifically, but all Plymouth, DeSoto. Valiant, and others are listed. No "Imperials", either.
Just what I found in there,
CBODY67