Add color! is a Lapis centered doujin compilation album. It was first released at Lapis Birthday Festival on the 14th of April, 2013 and later sold at The Voc@loid M@aster 24 on April 27 and also at Spring M3 on April 29. All of the tracks feature the vocals of Lapis along with her voice provider, Hinanata. There are six songs on the album, and an additional bonus track that is offered as a download to those who fill up the questionnaire that comes with the CD.
Official page can be found here.