According to the ETRTO, whose chart has been published by Sheldon Brown and others, a 32 mm tire would ideally be paired with a rim whose interior width is 15 mm or greater and a 35 mm tire should be mated with a 17 mm rim. But that chart's known to be awfully conservative. You'd almost certainly be fine, although I might personally stick to 32's.

Schwalbe has the chart on their web site:
Tire Dimensions | Schwalbe North America