李宗泫
"White" was written by band members Lee Jong-hyun and Jung Yong-hwa, with additional songwriting by miwa. The song was composed by Lee Jong-hyun, Ryo, and Go Jin-young, and arranged by Tomozaku Miura and Jun "Silky Voice" Inoue. It is an uptempo electronic rock song that incorporates a synthesizer; the lyrics deliver a "positive message about leading one's life, like trying to fill a blank map". In an interview with Excite Japan, Lee Jong-hyun articulated, "Light has three primary colors, but doesn't light become white by combining different colors? However, by combining various colors, it becomes black, too. So, keeping that in mind, isn't everyone turning dark when overthinking lately? So, 'let's be the light!', that is the theme." "White" steers from the band's typical musical style. Bassist Lee Jung-shin sensed an "exceptional transformation", noting a change in ambiance from Lee Jong-hyun's previous work. Drummer Kang Min-hyuk said that he was "surprised" that Lee Jong-hyun "challenged new things". Both members cited Lee Jong-hyun's history of writing ballads as source of their astonishment for the new sound. Vocalist Jung Yong-hwa observed the change as well, finding that the repetitious synthesizer was "quite appealing". Lee Jong-hyun expressed that he did not intend to surprise his listeners with the song, but described that the feeling came naturally afterward.