Fender guitars received a clear coat of lacquer for high gloss and to protect the color coat. Must have looked awesome back in the day. When we view those guitars today, it's as if we're wearing yellow-amber goggles. Take 'em off and our whole world brightens up. We have a pure Surf Green (no "warming" yellow added in), a pure, clear vibrant Sonic Blue. An Olympic white that's pure white with the faintest one part per million of Prussian Blue. (No banana pudding). And a pure ... bubblegum(?) colored Shell Pink.
What do you get mixing pink and yellow? Peachy orange. Fading to fleshy beige...
Therefore, any discussion of Fender colors must factor in the age. When we say here's a pic of a '56 DeSoto, the question to ask is "when was this taken"? Note the modern cars in the parking lot. Note the fleshy coloration. This is a current pic of a vintage paint job. No different than a vintage Shell Pink guitar. We still don't know what either of them looked like before the clear coat yellowed. But we can guess based on our knowledge of how plain old clear lacquer turns yellow.
The pink (aniline red) would fade. But the clear would darken and yellow. Combined, it creates an entirely new color. Faded fleshy beige. But I guess Fender marketing decided that might not be the best name...
What do you get mixing pink and yellow? Peachy orange. Fading to fleshy beige...
Shell Pink ——————————–—– Duco #2371 '56 Desoto
here's a 55 Desoto

The thing about Shell Pink is that the correct color, although it is technically “pink”, has this flesh-colored component to it.
Therefore, any discussion of Fender colors must factor in the age. When we say here's a pic of a '56 DeSoto, the question to ask is "when was this taken"? Note the modern cars in the parking lot. Note the fleshy coloration. This is a current pic of a vintage paint job. No different than a vintage Shell Pink guitar. We still don't know what either of them looked like before the clear coat yellowed. But we can guess based on our knowledge of how plain old clear lacquer turns yellow.
You are wondering what color a 1964 shell pink guitar would be in 2023. I think it would have faded to pinkish white. Depending on the amount of play and sunlight it has received any of these might be correct. I would think the more faded ones are more correct today.
The pink (aniline red) would fade. But the clear would darken and yellow. Combined, it creates an entirely new color. Faded fleshy beige. But I guess Fender marketing decided that might not be the best name...