Which tool can verify WCAG contrast ratios?

Which tool can verify WCAG contrast ratios?

• A. Contrast checker
• B. Color wheel
• C. Pixel ruler
• D. Keyboard tester

Answer: (A)

To verify WCAG contrast ratios, you need to measure how much foreground text stands out from its background by comparing their relative luminance. A contrast checker is built for this purpose: you input the foreground and background colors, and it computes the WCAG contrast ratio and shows whether it meets the required levels (like AA or AAA for normal or large text). This helps ensure text is readable for all users. The other tools don’t measure contrast. A color wheel helps you pick colors, a pixel ruler measures on‑screen distances or sizes, and a keyboard tester checks keyboard navigation.

To verify WCAG contrast ratios, you need to measure how much foreground text stands out from its background by comparing their relative luminance. A contrast checker is built for this purpose: you input the foreground and background colors, and it computes the WCAG contrast ratio and shows whether it meets the required levels (like AA or AAA for normal or large text). This helps ensure text is readable for all users.

The other tools don’t measure contrast. A color wheel helps you pick colors, a pixel ruler measures on‑screen distances or sizes, and a keyboard tester checks keyboard navigation.