It’s Formal wear. Without black color, colorful traditional Japanese kimono only pattern of a lot line. In Japan, Irotomesode can wear married woman and no married woman. By number of mon (Five, three and one mon), it is say that decided formal of kimono. You can wear substitute Irotomesode for Houmongi at formal ceremony. Irotomesode of one mon is formal wear than houmongi. Case of three mon is wear acquaintance of marry whthout kindred, and can wear formal celebration. Case of five mon is first formal wear as same as kurotomesode. The bag and zouri are used formal of gold and silver color at the time.