Color Outside the Lines is the first extended play by South Korean boy band Cortis. The EP was released by Big Hit Music on September 8, 2025, and is supported by the singles "Go!", "What You Want" and "Fashion".
In April 2025, Hybe Corporation, Big Hit Music's parent company, announced their plan to debut a new boy band in the third quarter of the year. Big Hit Music further confirmed the news in June, announcing an August debut for the group. The band members and its name, Cortis, were officially announced on July 14 and August 7, respectively.
Cortis released a music video for the track "Go!" on August 11, before officially debuting on August 18 with the release of the EP's lead single "What You Want". An English version of "What You Want", featuring American rapper Teezo Touchdown, was released four days later. Color Outside the Lines was released alongside the music video for "Fashion" on September 8.
According to data provided by Hanteo Chart, Color Outside the Lines sold approximately 250,000 copies on its first day of release, breaking the record for the highest first day sale for a K-pop act that debuted in 2025. Within a week, approximately 430,000 copies of the EP were sold, making it the fourth highest in initial sales for a K-pop act's debut album. In the US, the EP debuted at number 15 on the Billboard 200, the second highest ever for a K-pop act's debut album.
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