Negative Squared Latin Capital Letter B (Apple)

On Apple devices, the B blood type emoji is rendered as a clean, white circle with a bold, sans-serif 'B' positioned precisely in the center. Apple's signature smooth gradients and subtle 3D shading give this character an approachable, almost tactile feel, as if it were a raised button. Its simple yet clear design makes it instantly recognizable for medical contexts or personal identification on Apple devices.