"Blue" is a song by the American singer-songwriter Eiffel 65, released in 1998. It became a global hit, known for its catchy melody and distinctive electronic sound. The lyrics describe a character who feels isolated and experiences life through a blue lens, symbolizing sadness and loneliness. The song is notable for its repetitive chorus and use of synthesizers, which contributed to the popularity of Eurodance music in the late 1990s. "Blue" has been covered and remixed by various artists, solidifying its place in pop culture and making it a memorable anthem of the era.