RGB is a collection album by Akino Arai. It contains several singles and b-sides previously unreleased on an album.
- "昼の月"
- (Hiru no Tsuki, The Moon at Noon) - First ending theme of Outlaw Star
- "さかさまの虹"
- (Sakasama no Niji, Inverted Rainbow)
- "Little Wing"
- "黒い種"
- (Kuroi Tane, Black Seed)
- "月の家"
- (Tsuki no Ie, The House of the Moon) - Second ending theme of Outlaw Star
- "ばらの茂み"
- (Bara no Shigemi, Rose Bush)
- "星の木馬"
- (Hoshi no Mokuba, Rocking Horse of the Stars)
- "叶えて"
- (Kanaete, Grant My Wish)
- "祝祭の前(RGB mix)"
- (Shukusai no Mae (RGB mix), Before the Celebration Festival ~RGB Mix~)
- "花のかたち"
- (Hana no Katachi, Shape of a Flower)
- "フォロー・ミー"
- (Foro mii, Follow Me)
- "きれいな感情"
- (Kirei na Kanjou, Beautiful Emotions) - Ending theme of Noir (anime)
- "空の青さ"
- (Sora no Aosa, The Blueness of the Sky)
- "白昼夢"
- (Hakuchuumu, Daydream)