Coldplay's musical style has been defined as alternative rock, being compared to Jeff Buckley and Oasis, while on their MySpace profile, Coldplay describes their musical style as "very heavy soft rock". The band's music has been called "meditative"; it "[reflects] on their emotions" and lead singer/songwriter Martin "endlessly examine[s] his feelings". Martin's lyrical wordplay has been called feminist, similar to Andrew Montgomery of Geneva.

The tone of the band's first studio album, Parachutes, was defined as melodic pop with "distorted guitar riffs and swishing percussion". It was also described as being "exquisitely dark and artistically abrasive". In a review for A Rush of Blood to the Head, the songs were considered to contain "lush melodies and a heartbreak" and that they had a "newfound confidence." The music on X&Y has been considered to be "ruminations on Martin's doubts, fears, hopes, and loves."