For most people, there is no actual color blindness, but in some people there is a deficiency of color vision – color blind people do not see in black and white. We have previously asked about the prevalence of color blindness and males and females. This poll looks at the types of color blindness. There are two major types of color blindness: those who have difficulty distinguishing between the colors red and green, and who have difficulty distinguishing between blue and yellow. There are other types, but not as common. Take the poll is see if you are in the majority.