Different styles of salad require different styles of wine. A light salad would benefit from a crisp white wine such as a Soave or something from the Loire such as a Sancerre or Touraine Sauvignon Blanc. With a salad involving tomatoes you could choose a light red wine and if the salad has stronger flavours why not try a full bodied white wine. A Chilean Chardonnay or Gewurztraminer would be great.
Light crisp whites
Light reds such as Pinot Noir, Cabernet Franc or Gamay