In any discussion of color, a great place to start is with the challenges we face in communicating color. Here is an example that demonstrates color communication challenges. How would you describe the color of this rose? Would you say it’s yellow, sort of lemon yellow or maybe a bright canary yellow? Ask the same question of a couple of your colleagues and compare notes. The perception and interpretation of color is highly subjective. Eye fatigue, age, the environment in which you are viewing the color and other factors can influence color perception. But even without such physical considerations, each observer interprets color based on personal preferences. Each person also verbally defines an object’s color differently. As a result, objectively communicating a particular color to another person without using some type of standard is difficult. There also must be a way to compare one color to the next with accuracy.