Is a petty blue 1970 duster Rare?

ScampMike said
Petty Blue was not one of the "high impact" colors... it is less rare than others... typically it is the other options that determine the rarity of a car - not that color doesn't come into play. Tell us more about your car!

well, i think it was a slant six, it's an automatic, Petty blue or some kind of blue, its lighter, i need to look vin over, where is it located