Cool Blue is a track by the British synth-pop duo Eurythmics, appearing on their 2005 reissue album Boxed. The song exemplifies the group's signature style, blending electronic production with the distinctive vocal delivery of Annie Lennox and Dave Stewart. Released decades after their initial breakthrough, the recording reflects the band's enduring influence on the genre and their continued engagement with modern audiences through remastered and reissued catalogues. As part of the Boxed collection, the track stands alongside other key works that highlight the duo's evolution while maintaining their core sonic identity. The composition remains a staple of their discography, showcasing the intricate interplay between melody and rhythm that defined their career.