Well ive been having a hard time finding mix formulas for my '56 for the interior
From this website:
http://paintref.com/cgi-bin/colorcodedisplay.cgi?manuf=Ford&year=1956
They list colors for 1956 Ford interior paint:
Dark Brown, Medium brown, Medium green, gray. Dupont color codes are listed as 2286H, 2285, 59596, 59595 respectively. Those might be old numbers, but the name and old number might be useful to the supplier for finding the modern equivalent.