"La Vie en Rose" is described as a vibrant, groovy electropop track. Captivating from the get-go, "La Vie en Rose" blends a wide range of elements – ambient synths, stomping beats, tinny snare and echoing strings drive much of the track – in its attempt at achieving midtempo pop perfection. The melody soars with the members’ vocals, exploding with a pre-chorus build and sudden drop to the more restrained titular hook, serving up an introductory track that is all at once powerful and delicate. The song was composed and produced by the MosPick Music Producing Group from Cube Entertainment which is known for producing successful releases such as 4Minute's "Crazy" and HyunA's "Lip & Hip". The song was originally intended for K-pop girl group CLC, who had recorded the song for inclusion in their scheduled 2018 comeback.
Music video
On October 29, "La Vie en Rose" was released along with its music video through various sites and music portals, including YouTube, Melon and Naver TV. Directed by VM Project Architecture, the music video is inspired by the color red, with the twelve members seen singing and dancing in red-and-leather outfits, and "counters the more impactful outfits with softer feminine ones". The music video achieved more than 4.5million views in the first 24 hours of its release on YouTube, surpassing the previous record held by Stray Kids for most views of a K-pop group's debut music video within 24 hours. It exceeded more than 10million views within four days of its release. As of August 2019, the music video has received more than 100 million views on YouTube.
Commercial performance
"La Vie en Rose" peaked at number one on three of the South Korean major charts, including Bugs, Soribada and Mnet. The song also topped the iTunes K-pop Singles Chart in two countries and ranked within the top 10 in eight countries. "La Vie en Rose" debuted at number 6 on the Billboard World Digital Song Sales chart, selling 1,000 downloads in the week ending November 1, 2018, according to Nielsen Music, and was the week's third-biggest-selling K-pop song. As of March 2020, the song has sold 100,000 units in the United States.
