Undertone or Undertones may refer to: Music Undertone series, a sequence of notes that results from inverting the intervals of the overtone series The Undertones, Northern Irish band The Undertones (album), 1979 album by The Undertones Northwestern Undertones, a cappella group at Northwestern University, Evanston, Illinois, United States Other uses Operation Undertone, part of the Allied invasion of Germany in World War II Undertone (advertising company), a New York-based digital advertising company An underlying or implied tendency or meaning; a subtext Skin undertone, as it applies to cosmetics; see color analysis (art) Colour of a paint spread very thinly over a white surface See also Overtones (disambiguation)