The mandatory color choice for the Porsche 911 Sport Classic is Sport Classic Grey, a classic German hue that comes from a dove-gray color that the design team fell in love with after seeing it on

This is supposed to be the same color as modegrau (Stylish Gray) used in 1952, also supposed to be the same as the Champion Motorsports color "Man From Chile."
I have gotten two different paint codes and haven't been able to find out anything more about them, but I'm still looking. One code is Spies Hecker POR617. The other is L61H that I got off the Spies Hecker website, but the code isn't pulling anything up. Maybe it's only in Europe?

Modegrau:

Here's the best source for 356 colors: http://www.willhoitautorestoration.com/paintsamples.php
Don't know if its the same, but Dolphin Gray seems very similar.

very cool, thanks for that resource. I went to a paint shop yesterday and actually found, on the computer, a listing for the "modegrau" I posted above. If you type in the paint code without the L, just 61H, it will pull it up no problem.

I believe it is called "Sport Classic Gray" and the color code is L63A.