The 1971 Dodge Color & Upholstery Selector has been added to our Reference Library. :twothumbsup: Free to download. It even includes scans of the color chips.
https://www.e-bodies.org/resources/data-books-salesman-pocket-facts-color-upholstery-guides/
Full Book:
http://www.e-bodies.org/Resources/Data_Salesman_Color_Upholstery/1971_Dodge_Color_and_Upholstery_Selector.pdf
Challenger Section Only:
http://www.e-bodies.org/Resources/Data_Salesman_Color_Upholstery/1971_Dodge_Color_and_Upholstery_Selector_Challenger.pdf