Are you colorblind?
Color blindness, otherwise known as color vision deficiency, is a condition where a person cannot see colors under normal light. People who are color blind go through their lives without understanding the perception of color! Therefore, color blind people can never differentiate colors from each other.
Well, color blindness is not a singular condition. It in fact girds a range of conditions, from mild to severe, due to which each person to see color differently. The most common types of color blindness are Protanomaly and Deuteranomaly, which are forms of partial red-green color blindness. However, the complete absence of one of the cone photopigments, called Protanopia or Deuteranopia, are considered dichromats.