What is the absolutely correct blue engine paint color for a 74 Duster?

Yeah now that you mentioned it my stuff is closer to the light ford engine blue. The pic of the vht paint above looks closer to being right than the duplicolor of late has been.
I started with an old can (probably 2-3 years old) of duplicolor on mine and ran out, and the newer, more recent duplicolor I bought didn't match that at all
but the 2 cans I bought recently (from 2 different parts stores) matched each other pretty well