The Asia Color Association (ACA) Conference 2019 was held in Nagoya-Japan. This meeting provided a unique forum, bringing together researchers, academics, students, artists, architects, industrialists, engineers, designers, computer scientists, lighting experts, media professionals, exhibitors and business leaders. It is hoped that attendants can expand their knowledge and experience from listening to presented papers, reading posters, appreciating art works, and discussing each other. The theme of ACA2019 is “Color Communications“. Color has the power to change the world and future and it is increased through communication.