You might want to try the thisoldhouse.org website for paint ideas as far as color is concerned. Color is also relative to location, as well as date, I'm sure you realize by now
IF YOU ARE SERIOUS ABOUT GETTING THE CORRECT PERIOD COLOR OR EVEN AN EXACT MATCH I WOULD RECOMMEND YOU PAY A VISIT TO YOUR LOCAL HISTORICAL PRESERVATION SOCIETY. EVEN IF THEY DON'T PROVIDE ANY SERVICES THEY CAN BE AN EXCELLENT RESOURCE.