To accommodate users who don’t see color differences, you can use other methods to accentuate data, such as high-contrast shading, shape, or texture. Applying text labels to data also helps clarify its meaning, while eliminating the need for a legend. The right contrast is vital to catching users’ attention in the first place. The vibrancy you choose for your design is likewise crucial to provoking desired emotional responses from users. How they react to color choices depends on factors such as gender, experience, age and culture. In all cases, you should design for accessibility – e.g., regarding red-green color blindness.