Passports around the world are only made in four colours: black, blue, red and green. Surprisingly enough, there are no official rules or regulations governing what colours passports can be. Countries are free to choose whichever colour they want, and there are many variations in the shades of blue, black, green and red used for passports. So why is it that passports only come in shades of these four colours? A video by News 24 explores. According to them, the four colours that passports are manufactured in look the most official. The dark colours also hide signs of dirt and wear and tear. Countries choose them because blue, green, red and black look more official than, say, neon pink.
