Blue may refer to:
- Blue Falcon, Captain Falcon's Final Smash.
- Blue Pikmin of the Pikmin series.
- Blue Alloy, an enemy from the Fighting Alloy Team.
- Blue color used in costumes.
- Blue Team, a color option in Team Battle.
- Spiny Shell, also known as Blue Shell, an item appearing in Super Smash Bros. 4.
- Inky, a blue ghost from Pac-Man which appears in Pac-Man's up smash, as part of the Ghosts Assist Trophy and as a hazard in the Pac-Maze stage.
- Various Smash Run enemies:
- Blue Shy Guy from the Mario and Yoshi series.
- Blue Kritter from the Donkey Kong series.
- Blue Bubble from the Zelda series.
- Pokémon Blue, a game in the Pokémon franchise.
- Blue, a Smasher from New Jersey.
- Blue, a Smasher from Arizona.
- Blue, a Smasher from Indiana.
- Blue, a Smasher from Chūgoku, Japan.
The following trophies and stickers have Blue mentioned in their titles: