Though there isn't much research data available, we can confidently say that the rarest eye color in the world is green. Amber, violet/red and black are also extremely rare.
The golden (Rh null) blood is the rarest blood group, lacking Rh antigens in the red blood cells (RBCs). Learn more about the golden blood type, other rare blood types, and blood charts. Proteins known as Rhesus (Rh) factors or antigens are completely absent in the red cells of peopl...