Eric,
Let me know by PM or email if you need another swatch from a backpad I got from Jonathan to patch in repairs on my tan interior (it matches to my 73 MY #31 Beige interior in color & thickness & IIRC 73-74 were same fabrics), so a true fabric match would be helpful if I need to do more reupholstering on it.
BTW, the factory called it "Beige" in the 71-74 timeframe for sure (see #31 & 32 in charts below), although we hear tan, caramel, cinnamon, etc. thrown around all time.
Click to view attachment Click to view attachment Additionally, there were color differences between MYs - as well as fabric thickness, smooth & perforated& basketweave & brickweave inserts, & stitched vs. heat seamed differences. The later 75-76 color seems a bit darker to me, compared to earlier 70-74 samples at Jeff's website:
http://www.bowlsby.net/914/Classic/PaintFabrics.htm