1970 Charger 318 engine paint

What is the correct color blue for the engine- 1970 Charger 500 with a 318? We have a few cans from local suppliers and none look close enough to the original still in the car. What paint is best to use? Thanks

I had a quart of Corporate Blue mixed up to paint my 71 340.

I was originally going to get them to color match and old piece of the engine but what I noticed when I cleaned everything down is that due to age, heat, grease, oil, etc over the years all pieces looked a little different shade of blue.