Dark blue can refer to:
- Dark blue (color), a variant of the color blue
- Dark Blue (film), a 2002 film directed by Ron Shelton and starring Kurt Russell
- "Dark Blue" (song), a song by the American piano rock band Jack's Mannequin
- Dark Blue (TV series), a 2009 TV series on TNT
- The original name of the supergroup Dark New Day.
- Dark Blue (magazine) (1871–73), British magazine for graduates of Oxford University
- "Dark Blue", a song by the band No Doubt, from the 2000 album "Return of Saturn"