I once dyed the console carpet in my 68 Dart from a gold color to a burnt orange.

I used the cheap RIT dye from Walmart. It took quite a few dunks into the dye to get the shade I wanted, and I must say it came out close, alittle lighter but not bad. No odor.

Not sure how easy a full piece of carpet will be how ever. I used a 5 gallon pail for the console piece. You might have to use the bathtub

codfish