Green was a very popular color then so I doubt you'd find a year without green. I found one site that says the car was a 1963, who knows if it is correct or not.
Here's one place you can start as far as colors:
http://paintref.com/cgi-bin/colorcodedisplay.cgi?manuf=Chrysler&model=Valiant&con=mo&year=1963&rows=50
Here's one place you can start as far as colors:
http://paintref.com/cgi-bin/colorcodedisplay.cgi?manuf=Chrysler&model=Valiant&con=mo&year=1963&rows=50