Very interesting, thanks guys. I've imported and color-sampled the 110 tail section Devil is working on, and the only place I get close to his 177/135/37 values is the dark band along the very top edge. Even the wider dark band just below the top edge has Red values at 225 or above. The very brightest area reads 255/255/125. That is pretty close to the restoration photo's bright spots.
I think I see the desaturation in Vraciu's P-51 tails. I like those too. I'll give Greebo's USAAF yellow value 200/145/40 a try, and desaturate it some. This aircraft is a vet of 90 missions so the yellow should probably be somewhat faded...