Question 1

What is WCAG contrast ratio?

Accepted Answer

WCAG (Web Content Accessibility Guidelines) contrast ratio measures the luminance difference between foreground and background colors. It ranges from 1:1 (no contrast) to 21:1 (maximum contrast, black on white). Higher ratios mean better readability for users with visual impairments.

Question 2

What contrast ratio do I need for WCAG AA compliance?

Accepted Answer

WCAG AA requires a minimum contrast ratio of 4.5:1 for normal text (under 18pt or 14pt bold) and 3:1 for large text (18pt+ or 14pt+ bold). This is the standard requirement for most websites and applications.

Question 3

What is the difference between WCAG AA and AAA?

Accepted Answer

WCAG AAA is a stricter standard requiring 7:1 contrast for normal text and 4.5:1 for large text. While AA is the minimum legal requirement in many jurisdictions, AAA provides enhanced readability for users with more severe visual impairments.

Question 4

How do I fix low contrast in Tailwind CSS?

Accepted Answer

Use our suggested accessible colors feature. If your current combination fails WCAG, the tool suggests Tailwind color alternatives that pass AA standards. Generally, pair light backgrounds (50-200 shades) with dark text (700-950 shades) or vice versa.

Question 5

Does color contrast affect SEO?

Accepted Answer

Yes, indirectly. Poor accessibility can increase bounce rates and decrease user engagement, which are SEO ranking factors. Google also considers Core Web Vitals and user experience. Additionally, accessibility lawsuits are increasing, making WCAG compliance important for business reasons.

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