Now You See It, Now You Don't

Everyone has an opinion about color. Although we tend to assume that people see the same colors, who hasn't disagreed about an object's particular shade? Whether something is blue or indigo usually isn't a major issue, but when it comes to creating an interface that uses color to code information, serious problems can arise for some users if designers are unaware of certainprinciples that govern how people perceive their work. For example,among the one in 12 men who havecolor-deficient vision, perhaps two thirds or more experience problems significant enough to impact their ability to carry out everyday tasks.By following a few basic guidelines, it's possible to ensure that Web browsers and other interfaces do not put such users at a disadvantage. Developers can accomplish this for little cost and without compromising the designs' wider qualities.