"Blue (Da Ba Dee)" is a popular song by the Italian group Eiffel 65, released in 1999 in the key of G minor. It was written and produced by the trio, comprising of Jeffrey Jey, Maurizio Lobina, and Gabry Ponte. The track became a massive hit worldwide, reaching the top charts in several countries. The iconic electronic dance-pop song features lyrics that depict a person living in a world painted entirely blue. Interestingly, the song's inspiration reportedly came from a computer-generated melody that the group stumbled upon while experimenting with new sounds. The melody of "Blue" is characterized by its catchy and repetitive synth hook accompanied by high-energy beats, which contribute to the song's memorable and catchy nature.