Anything kale will be a challenge to pair a wine with as they have to fight with a vinaigrette and also lots of chlorophyll. The acids in vinegar are different and usually make a wine taste as if it has gone rancid. Chlorophyll will contrast with the wine, tasting more bitter. If you dare to take on the herculean task of finding a wine that pairs well, try something sweet, bubbly, or high acid. These wines can take almost anything you throw at them, so they should work fine.