What tool helps verify contrast ratios?

• A. Contrast-check tools
• B. Spell-checker
• C. Performance profiler
• D. Color picker

Answer: (A)

Verifying contrast ratios is about ensuring text is readable against its background for users with vision variations. A contrast-check tool analyzes the chosen foreground and background colors, computes their contrast ratio, and shows whether it meets accessibility guidelines (commonly 4.5:1 for normal text, 3:1 for large text, with higher thresholds like 7:1 for stricter requirements). It often offers quick suggestions to adjust colors or font weight to achieve proper contrast. The other tools don’t perform this check: a spell-checker focuses on spelling errors, a performance profiler analyzes how quickly or efficiently the page runs, and a color picker helps select colors but doesn’t automatically verify whether their combination meets accessibility standards.