KurtM.Weber N8751D Seems to have been re-painted in Delta Connection colors, though it's still operated by Pinnacle.
DougRobertson Many feeder commuter aircraft with a major airline contract connection do that. it probably reassures the through connecting passengers of the "legitimacy and safety" of the smaller aircraft.
TimothyAanerud Northwest Airlines was bought out by Delta. Their whole fleet including aircraft operated by regional carriers is being assimilated to Delta livery.