moving grille bars.

Vermont Green is considerably yellower and lighter than Willshire Green. Lexington Green is a bluer, spruce green.
Seeing some other Packards in the colors you are considering is in my opinion a good step to take before painting yours.

You do realize this is not an authentic fitment I trust.

there's a pragmatic reason. The description doesn't change - the value does. Creates an update issue.

Since the biggest cost in interior work is generally labor, it is particularly dim to save by using cheap shiny velour.

Many fifties cars are difficult to do correctly (didn't Patricians normally use patterned inserts?) because nylon and rayon multicolor and patterns were used, and SMS is particularly good at those. For broadcloth and Bedford Cord era stuff, wool looks right and polyblends and velours look obviously incorrect. I had great luck with Hirsch on a match.

I'm sure with your background you're not surprised that the scan and software match wasn't that good. Even with a multiangle spectrophotometer available, we still use expert eye for getting OEM approval formulae on any metallic, pearl, etc.

first I agree it's your car and you can do what you wish. Let me offer this summary:

would you lose points at a mixed marque show? probably no
would you lose points at a Packard meet? yes

Careful of the aluminum flake size on the Packard Blue - the original is very fine, not "sparkly"

much expansion of the place in recent times. Check if you are going on a weekend as there is often a meet being held there too.

I think the idea is much like Buick's (2 bodies x 2 engines = 4 models, Special, Super, Century, Roadmaster) and not that dissimilar to what Packard did in 1940-1941's 110 - 120 - 160 swb. I don't think either company did a particularly good job of distinguishing the models from a marketing/styling standpoint. Packard nuts like us may be able to tell a 120 from a 160, but even old car guys have a hard time. But it was a lot easier to tell a Buick from a Cadillac. The resource (and idea?) insufficiency may have been in not having a second new style to complement the Clipper. Get ready to cringe: the bathtub was a Clipper derivative which looker different and yes more modern (the fuselage bodies of Nash, Hudson, Frazer, and Packard were more modern than market bully GM).

Imagine in 1947-48 a clipper facelift with the 282/288 and a more extensively modified version with the 356. Then in 1950 an OHV V8 in the same bodies. then new bodies in 1951

thanks, something learned today - yes, "imitation leather" is marketingese for vinyl.