I know this topic has been run through the mill. In researching the correct color for the Rally II's, I looked a many examples, asked and did the home work for finding the right colors.
Since the removal of lead in paint, the silver now has to be a metal flake. The suggestion of Duplicolor # T229 silver is very close to the factory silver in shade. But the metal flake does give it sparkle. I found in painting my spare rim with the T229, if you take some very fine steel wool it knocks out some of the sparkle.
The Charcoal is another story. The factory paint color, PPG # DDL32947 does appear to be on the (join me Luke) dark side. I have a pic somewhere of a un-restored museum quality '69 T/A's Rally II. As I recall it was quite lighter than the PPG paint I purchased. So I'm still in debate whether or not to use the PPG Charcoal.
I'll see about finding the pic. BTW both the Duplicolor and PPG paints are acrylic lacquer.