Kroi is a Japanese band formed in Tokyo in February 2018. When mixing all colors, you make "black". Kroi replaces "all colors" for "all music genres", and thinks that mixing colors of all music genres will be the trigger of creating some original sounds. They also like black music, and they try to sublimate influences and shocks received from black music in their own Japanese way. "Black" is "kuroi" (黒い) in Japanese, so they named the band "Kroi"