The authentic okuchi bakama was sometimes called "akaokuchi," to differentiate it from white or pale blue okuchi bakama which was later worn by boys or samurai as outer wear.
後世、少年や武家の袴として白や浅葱の大口袴を独立して使うようになったため、正式な肌袴としての大口袴を特に赤大口と呼ぶこともある。