According to info I have.There was only 1 color blue offered on74-75 dusters. It was called Lagoon blue. there was another light blue offered bu only on 76 models. If you have the broadcast sheet or fender tag, you can get information there also. I would suggest contacting Legendary Interiors at 1-800-363-8804 or www.legendaryinteriors.com. Allot of us have got our interiors from them. They will help you find the color codes on fender tag or broadcast sheet. they even sent me sample of interior before I ordered to make sure I had the right match.