"Blue (Da Ba Dee)" is written in the key of G minor, with the vocal range spanning from C3 to E♭4,[9] and is set in common time with a moderate tempo of 128 beats per minute.[10] The song's lyrics tell a story about a man who lives in a "blue world". It says that he is "blue inside and outside", which, alongside the lyric "himself and everybody around 'cause he ain't got nobody to listen", and "blue are the feelings that live inside me" may indicate that the term blue represents his emotional state; however, the song also explains that a vast variety of what he owns is also blue, including his house and his car ("a blue Corvette"). Various blue-coloured objects are also depicted on the single's cover.[11]