I don't know if Frank makes a standard blue but if he does it's probably right on the money. In your case you might consider going to the paint store with an original sample for a color match, get it mixed in single stage PPG Delstar DAR Acrylic Enamel.
*The only 69 carb I have is a 4611SA D9
Frank doesn't have the blue unfortunately.....he does have the turquoise....so It's looking like SPD's may possibly be the determining factor on color.
My buddy picked up an early 69 Swinger 340 and according to Moparo.....who is doing the car for him.....he has found a lot of traces of turquoise on that engine.
That engine plant did not do Hemi's or BB's.....so there would be no need for them to have any orange paint around.....in 69 anyway.
