Lo explained the song's title is a reference to "tan lines", incorporating that it is about "dwelling in the sun" and the "strange" way of life in Los Angeles that she considers to be "so darkish and so exciting". According to Lo, the track's title refers to tan lines and its lyrics are about letting go of one's concerns. Lo, Finneas, Ludvig Söderberg, Jakob Hazell and Svante Halldin.