Thanks gents. Those give lots of food for thought but also lots of nice examples.
Focusing on two
1. Light blue: Ok, I'm convinced, on my list for the future...can work very nicely for summer so long as, as SB emphasizes, darker than shirt.
2. Beige and similar colors: UC, I'm feeling the first pic more than the second, and I think partly that's the blue versus white shirt. Not sure if that's just me (and this is a relative ordering). I like the first a lot.