Arema–Persib Bandung rivalry or Western Blue and Eastern Blue derby is the name given in football to any match between two Indonesian football clubs in two different league background, Persib Bandung (Perserikatan) and Arema FC (Galatama). The fierce competition between both teams began in 1990 when Arema FC and Persib Bandung face off in the semifinals 1990 Jawa Pos II Cup.