You can find the correct interior color codes in the Library at
www.hamtramck-historical.com .
Many people are not aware of the pearl-type colors that Chrysler used up unto the 1974 model year. BUT when you put the Chrysler Pearl White next to a GM White or a Ford White, the differences are very apparent and astounding. Been there, done that.
Suddenly, just as with their exterior "white" colors, the GM white gets a blue tint and the Ford White becomes creamy, next to the Chrysler white. Otherwise, separately, they are all "white" and you don't notice the shade differences unless you know what you are looking at.
As long as Legendary Interiors has been around, with their award-winning repro interior items, I would trust their judgment more than not. IF you do get their products, DO compare them to the door panels in the car now. With age, the Pearl White can "fade" and look a bit dingy in some areas, that will not wash off. The images from the Legendary (or similar) website cannot effectively indicate that their products have the factory Pearl White vs. normal White.
DO look in the Color and Trim Guides at the Hamtramck Historical Library website. DO TALK to the Legendary operatives to see which color code matched the interior color code of your vehicle. Then proceed as desired.
Just some thoughts and experiences,
CBODY67