O Button (Blood Type)

A red square button with the letter “O” inside, indicating the O blood type.

The 🅾️ O Button (Blood Type) emoji represents blood type O. In East Asian pop culture, type O is often linked to being confident, outgoing, and sociable. In medical contexts, it refers to the O blood group, which is known as the universal donor. Outside of these, it can also be used decoratively or to represent the letter “O.”

• Represents blood type O.
• Used in medical, cultural, or decorative contexts.
• Can symbolize the letter “O” in creative designs.