37 Chrysler royal 6 cyl

I have a 37 Chrysler royal and want to paint the engine the correct color for that year. I believe mine is original and it is blue green, both block and head. I have a Ditzler paint chart for that year for exterior colors, and it lists 2 colors as special. One is a gray silver and the other is meadow brook green and neither come close to my engine color. Could these be engine colors? The sales brochure for that year shows a gray silver block with a blue head. Are engine paint codes and or color chips available for this car, and if so could someone let me know where to find them?

thanks Al