A new and distinct cultivar of hibiscus plant named ‘DUP-CNS’, characterized by glossy, dark green leaves, upright growth, and a very large flower characterized by a large dark red eye which extends approximately 25 percent of petal length, the eye sharply margined with a light pink zone which extends to approximately half the petal length, the pink zone grading into a brownish-orange zone which grades to a darker brownish-orange edge, the underlapping edge being more pink orange.
