Need more info but only have VIN

Hi guys. Sorry to bring this thread back but I don't believe the duster is b7 evening blue I thinks its b5 true blue. based on the documentation below it doesn't look like b7 was an option on the plymouth duster. Also, I found the code for the white stripe.

Dealer Brochure with all options for 1972 duster. You will see on the one page the 16 different colors available for a 1972 duster and b7 isn't one of them:
1972 Plymouth Duster | My Classic Garage

White stripe code and options:
The 1970 Hamtramck Registry - 1972 Plymouth Color & Trim Book - Stripes & Interior

Percentage of cars made based on color. Note that b7 isn't listed here either for 1972:
What is the most desirable exterior paint color?

Let me know what you guys think. Based on this I am certain the car is B5. Just guessing the sun made it look darker possibly.