Auto Color Library has the original paint chip charts, which give the names and codes for the exterior and interior colors (top of the dash is zero gloss.) Hopefully your local paint supplier can cross reference to modern paint codes. This is the page for 1968:
https://www.autocolorlibrary.com/pag...HorizontalTab3 Here is 1969:
https://www.autocolorlibrary.com/pag...HorizontalTab3