CORTIS (abbreviation for "Color Outside The Lines"; Korean: 코르티스) is a South Korean boy group under BIGHIT MUSIC, a subsidiary of HYBE Corporation. The group is composed of 5 members: Martin, James, Juhoon, Seonghyeon & Keonho. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.