레인보우 | pt

Rainbow Blaxx (레인보우 블랙) is a sub-unit derived from the South Korean idol group Rainbow. The members chosen for the group are Jaekyung, Woori, Seungah and Hyunyoung. Their début mini-album was RB BLAXX (20 Jan 2014). The lead single for RB BLAXX was "Cha Cha" and it's music video was released the day before the mini-album. .