"Blue Sunday" is a gentle, contemplative Jim Morrison composition from The Doors' 1970 album Morrison Hotel. Following directly after the driving intensity of "Peace Frog" on the album's sequencing, this track provides a dramatic shift in mood. Performed at a languid tempo of approximately 75 beats per minute in the key of F, the song has an intimate, almost acoustic quality that reveals a softer side of the band. Robby Krieger's electric guitar solo is tasteful and melodic, with a warm, clean tone that suits the song's reflective atmosphere. His approach here is markedly different from the aggressive blues-rock soloing heard elsewhere on the album, demonstrating his ability to adapt his playing to the emotional demands of each composition. The solo floats gently over the rhythm section, adding a layer of understated beauty to Morrison's tender vocal performance. Morrison Hotel is often divided into two conceptual halves, with the harder-edged material on the first side and the more nuanced, varied material on the second. "Blue Sunday" belongs firmly in the latter category, offering a moment of quiet contemplation amidst the album's louder passages. The track showcases The Doors' dynamic range and their capacity for musical subtlety beyond their reputation as a high-energy rock band.