Joseph Rudolf "Rudy" Nappi, the artist from 1953 to 1979, illustrated a more average teenager. Nappi was asked by Grosset & Dunlap's art director to update Nancy's appearance, especially her wardrobe. Nappi gave Nancy Peter Pan collars, shirtwaist dresses, a pageboy (later a flip) haircut, and the occasional pair of jeans. Nancy's hair color was changed from blonde to strawberry-blonde, reddish-blonde, or titian by the end of the decade. The change was long rumored to have been the result of a printing ink error, but was considered so favorable that it was adopted in the text for books published after 1959, and by illustrator Polly Bolian for volumes she created for a special book club in 1959–60.