The vehicle-build paint codes (like LL1) stayed the same for many years to refer to "Dark turquoise", in this example. But what exactly "Dark turquoise" is varied as we see here. The paint-formula code (12708, 12765) defines what "Dark turquoise" is, exactly, for any given year-make-model.
This thread reminds me of a fish story printed many years ago in…I'm pretty sure it was Mopar Collector's Guide, or else it was Mopar Action. Dude had a C-body of some kind, I think a '71 Fury, built/coded for (if I remember correctly)
Y3 "Curious Yellow", PPG 2320. In the course of his nut-and-bolt restoration, naturally he got it painted, but it came out way too yellow.
What the magazine printed was a steaming pile of bulk wrap about how PPG had reformulated Curious Yellow paint to catch the market for bright yellow-green fire trucks, without bothering to think of the market for repainting old Mopars, and when it was brought to their attention they went oops and were all embarrassed at having been caught, etc.
False! Every paint supplier has thousands and thousands and thousands of colours, many of which are quite similar but not identical; they don't go "Heck, we can combine this one and that one and then the fire truck people will buy it!". That's not a thing. What actually happened was someone fuсked up, simple as that. Ordered the wrong paint, ordered the right paint but it was mixed wrong, whatever.
