ive been reading up on the paint codes and noticed that for mint julep it has code 568-17779, but my car has HJ5978 for the paint code, which still is mint julep. why is this so? did they change codes after a certain point in production? or do i have some super rare bathurst special colour that means i can sell my "S" model for the price of an A9X?????

my car is a 6/77 lx.
cheers y'all