A Button (Blood Type) 🅰️

This emoji displays a bright red square with a white capital letter "A" in the center, mimicking the appearance of a button or badge you'd find on medical equipment or donor registration cards. The bold, sans-serif lettering and vibrant red background make it instantly recognizable and distinct from regular text.

The primary use of this emoji is to denote blood type A, commonly seen in medical contexts, health discussions, or when someone wants to share their blood type casually online. Beyond literal blood type indication, it's occasionally used as a playful button or label in creative messaging, though it's far less common than other emoji in everyday conversation. Some people use it humorously when they want to "grade" something as an A, similar to school report cards.

On different platforms, the design remains fairly consistent—a red square with white lettering—though minor styling differences exist between Apple, Google, and Samsung renderings. The emoji originated from Japanese mobile culture, where blood type buttons were used in early phone interfaces. It's sometimes confused with the generic "A" button symbol, but the distinctly colored square design makes context clear.