The mountain-like patterns on short coats are those of Ako Roshi of Chushingura, when they marched into and attacked the KIRA residence, and very light blue is said to be the color of the seppuku kamishimo worn by a samurai when he commits hara-kiri, but the short coats of Shinsen-gumi seem to have been abolished after the 1st year, and the last recorded instance of the coats being worn was in the Ikedaya Incident.
羽織のダンダラは忠臣蔵の赤穂浪士が吉良邸に討ち入りするときに着ていた羽織の柄で、浅葱色は武士が切腹の時に着る切腹裃の色だと伝えられているが、羽織は実際には最初の1年ほどで廃止されたらしく、池田屋事件の時に着用していたとする証言が最後の記録である。