Also known as: 黒乳首, 深色乳头
Nipples which are notably dark in color, usually in shades of brown to black. Regarded in Japan as an accompanying sign of pregnancy or aging, while the more western pink-to-red spectrum is seen as a sign of youth.
This also includes Dark Skinned characters where the nipples are actually darker than the surrounding skin.
Use this tag when the nipples are fully visible. When the nipples are covered with the areolae slipping out, use Dark Areolae instead.