Unfortunately, no. Chrysler reports that they don't know.
Karmann (who actually built the cars) doesn't know either.

So we're left to guess. There is a thread for posting SRT-6 VIN numbers, colors and options. They've compiled a decent database of cars, and we can guess at what colors and what numbers.

I don't remember the exact break down, but black was the most popular, and grey (not SSB) was the most rare.