bradartigue
True Classic
I just found this paint reference site:
http://paintref.com/cgi-bin/chipdisplay.cgi?year=1975&manuf=Fiat&info=&page=1
I've had several sites bookmarked, but this one is fairly complete.
I was about to post the same thing; it's mighty handy and even has samples in some cases (426 shows a FIAT painted in - you guess it - 426!)