IMO and my .02 worth, I don't know anyone alive that would tell you that that particular shade of WB is "wrong". At the 2005 Western National meet there were at least three 36 Ford in line that were "Washington Blue" and all three were different. They all depend on the calibration of the paint mixer, atmosphere, air pressure, spray gun, air temperature, lighting, all make a difference in the "exact" out come.
I'd bet that Ford had several paint suppliers and that the colors differed a bit from lot to lot.
My grandfather worked at Ford for years, he had a story that Ford had a deal with Dupont. Chyrstler wanted to use Dupont so Henry made a deal, Chysler got to use Dupont and Ford got Hydralic brakes.
Who knows?
Bruce
Steve, like you, I locate a place that has been out of the natural elements since the car was "born". That offers the best example of what the color was when freshly applied. Even then, there is little doubt it faded or became darker with age. Different pigments react differently to age.FWIW, I just had a quart of WB paint mixed up that was a match to the inside of a 1936 Ford headlight bucket. It is hard to tell from the pictures as I shot them in sun light and the pictures of the paint came out almost black so I used photoshop to lighten the picture. But the mix looks really good. Not sure who OMNI is but the formula does say PPG at the bottom. Oh, this mix is for base paint with clear coat.
Let me make a couple of sample cards and I'll be glad to send a finger print worth of sample paint along with the formula to anyone who wants it.
Oh, I did order a spray can sample of the Isuzu Cavalier paint and it was too dark.
I better date this post or I'll be getting emails 20 years from now.
Steve in Denver
March 9, 2019