Here's an old thread from 2007 on the subject that might help.
Like Hank says, the "correct" color shade of the charcoal is debated, as you will see. I suspect there were multiple correct shades used. It just goes along with many things that vary with these cars, even within a model year.
Once I had studied all the information and settled on the charcoal color I'd use on a set of wheels I picked up, I found that the masking kit was a bigger issue if you want clean paint lines. The mask was a good start but a whole lot of extra tape masking and X-Acto blade work was needed.
