What is a good color contrast ratio?

A contrast ratio of at least 4.5:1 is required for normal text under WCAG AA standards. Large text (18pt+) needs 3:1. For AAA compliance, normal text requires 7:1 and large text 4.5:1.

Why is color contrast important for accessibility?

Poor contrast makes text unreadable for people with low vision, color blindness, or those viewing screens in bright sunlight. Good contrast ensures your content is accessible to everyone.

What does WCAG stand for?

WCAG stands for Web Content Accessibility Guidelines. It is the international standard for web accessibility, including color contrast requirements.

Does this tool work offline?

Yes. Once loaded, the tool works entirely in your browser with no internet connection needed.

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Verificador de contraste de núcleos

Verifique se o texto e os núcleos de fundo atendem aos padrões de acessibilidade WCAG 2.1 para texto normal e grande. Essencial para designers e desenvolvedores.

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Cor do texto

Cor de fundo

A rápida raposa marrom salta sobre o cachorro preguiçoso.

Texto normal AA
(4.5:1)

Texto normal AAA
(7:1)

Texto grande AA
(3:1)

Texto grande AAA
(4.5:1)

WCAG 2.1 define texto grande como 18pt (24px) ou 14pt (18,66px) em preto. A proporção é calculada a partir da luminância relativa de cada cor.