Which component of CARP is most associated with readability for colorblind users?

• A. Contrast
• B. Alignment
• C. Repetition
• D. Proximity

Answer: (A)

Contrast is what makes content readable for colorblind users. When there’s a strong difference in lightness and brightness between text or icons and their background, people can distinguish what’s on the screen even if color cues aren’t perceived the same way. Relying on color alone to convey meaning—like red versus green—can fail for colorblind users, so using clear contrast ensures text, buttons, and icons stay legible and perceivable.

Alignment, repetition, and proximity help with layout and visual rhythm, but they don’t directly improve the legibility of content across color vision differences. They aid organization and consistency, not the fundamental ability to read or identify elements when color cues aren’t reliable.