check the schwinn catalogs......lots of good colors on them(and theyd be correct for a schwinn as well...i think cman posted a link to them through trfindleys site in the bike id sticky section....you can also browse nostalgic as well for good color combo ideas)
Something like this, but do a two tone frame, primarily black with maybe a camel/ tan front section (and camel/tan near the bottom bracket and back dropout area? A sprinkling of brass fasteners like kram did, maybe some brown wall retro runner tires on glossy black wheels. Shiny hubs optional.
How about shiny Olive Drab and cream, with reddish maroon details?
Funny thing, I always know the colour of my next bike, even thou I rarely know what I´ll build...