Blue on blue
Blue on blue may refer to:
Music
- "Blue on Blue" (song), a 1963 hit song recorded by Bobby Vinton
- Blue on Blue (Leigh Nash album), 2006
- "Blue on Blue" (James Blunt song), a 2013 song by James Blunt
- "Blue on Blue" (Pet Shop Boys song), a c. 2006 song by the Pet Shop Boys
Television
- "Blue on Blue" (Ugly Betty), an episode of Ugly Betty
- "Blue on Blue" (Under the Dome), an episode of Under the Dome
Other
- Blue on Blue (book), a 2017 book about police misconduct by Charles Campisi and Gordon Dillow
- Blue on blue (military), inadvertent firing towards an allied NATO military force