TV Anime/Data Carddass "Aikatsu Friends!" Insert Song Single 4 - Fourth Color: BLUE

'TV Anime/Data Carddass "Aikatsu Friends!" Insert Song Single 4 - Fourth Color: BLUE (TVアニメ/データカードダス『アイカツフレンズ!』挿入歌シングル 4 - Fourth Color: BLUE))​is the fourth single for the insert songs of the Aikatsu Friends! first season. The single was released on February 27, 2019.