When I needed paint for the 63 tach assembly and column I used the chip charts at, http://www.tcpglobal.com/aclchip.aspx?image=1963-chevrolet-pg02.jpg , to get the paint number. The paint distributor then has to call the PPG paint library since it isn't in the system and have the formula faxed to them. The 62 chips don't show interior trim colors like the 63 but mine was also Dark Fawn.
The color matched mine with no problem. The formula shown also included the correct amount of flatner mixed right into the paint.
Probably no one wants to answer because I don't think anyone has all the answers to interior colors and doesn't want to be the one to give you the wrong information.
Bill
Nobody has anything good to say? Even bad would be ok.
My paint guy was able to match the interior color fairly close by scanning a piece of the original color. It needs to be flat, like an ash tray or a glove box. The scanner doesn't work well with curved surfaces (like trim, the shift column, etc.).
I redid my 62s when I converted from automatics to floor shift units, and used parts from the Belair, as the SS has lots of bright pieces in those same locations. Both were Aqua, and the result is fairly close. I left the dashes, as they were in good shape. I figure these parts might have been painted by different vendors back in 1962 anyway .
Good luck on your color matching!
TomK