When designing a survey for Paralympic athletes, which consideration is important for accessibility?

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High color contrast is essential for accessibility because it makes text, questions, and controls readable by people with visual impairments or those viewing the survey on different devices and in varying lighting. Using a strong foreground and background pair ensures content remains perceivable, even for low-vision users or color-vision deficiencies. Following established contrast guidelines (for example, aiming for a contrast ratio around 4.5:1 for body text and higher for smaller text) helps ensure readability without straining the eyes. Also, don’t rely on color alone to convey information—include clear labels, icons, or patterns so all users can understand the content even if color perception is limited.

Other factors mentioned—like idioms, refresh speed, or granularity—relate to different aspects of usability or content but aren’t primary accessibility considerations for visual readability in this context.