Kim Hee-soo (Korean: 김희수; born May 10, 1994), better known as Colde (Korean: 콜드), is a South Korean singer-songwriter. He debuted in 2016 as a member of the indie duo Off On Off. As a solo artist he has released the extended plays Wave (2018), Love Part 1 (2019), and Idealism (2021). Colde is part of the lineup for the Grand Mint Festival 2020 which is scheduled to take place on October 24-25, 2020 at Olympic Park in Seoul, South Korea.