Remove half of the cream cheese spread; place in medium bowl. Add pesto; mix until well blended. Stir in half of the sour cream. Place remaining cream cheese spread in separate medium bowl. Add peppers; mix well. Stir in remaining sour cream. Cover both bowls.
Refrigerate at least 2 hours.
Spoon dips alternately into 1 serving bowl. Swirl with knife to marbleize, if desired. Serve with the crackers.