Urq Colors

[Andrew Pennell <apennel@vermontel.com>]

I have an 81 TQC. I have always thought it was Mars Red. However, I recently refinished the sunroof. I had the paint mixed by a professional using the specs listed for the Audi Mars Red color, but the result was much different. I expected to have some difference due to the age of the car, the effects of fading, and the fact that you can never match a 15 year old color perfectly, but the difference is too much to be because of fading. The color does not even come close to the color inside of the trunk away from sunlight. The "new" Mars Red is much more red, whereas my cars original paint has a brownish/dark orange color. 
 	Are there two different specs for Mars Red? Could the difference in fact be bacause of age? Or is it possible that the paint was mixed improperly. TIA - Andrew