Verificador de Contraste
Verifique o contraste segundo WCAG AA/AAA.
Bom contraste mantém o texto e a interface legíveis para todos, inclusive pessoas com baixa visão. Busque pelo menos 4,5:1 para o texto.
Um pequeno jabuti xereta viu dez cegonhas felizes
Um pequeno jabuti xereta viu dez cegonhas felizes
- Texto normal AA · 4.5
- Texto normal AAA · 7
- Texto grande AA · 3
- Texto grande AAA · 4.5
- Componentes de UI 3.0
Todas as conversões de cor são feitas localmente no seu navegador — nada é enviado, armazenado ou registrado.
Como funciona
- 1 Choose a foreground (text) color.
- 2 Choose a background color.
- 3 Read the contrast ratio and AA/AAA pass/fail.
- 4 Follow the suggestions until it passes.
Casos de uso comuns
- Make sure body text meets WCAG AA (4.5:1).
- Check button and link colors for accessibility.
- Validate a brand palette before shipping.
- Avoid low-contrast text that's hard to read.
Perguntas frequentes
Is my color data sent anywhere?
No. Every conversion and calculation runs entirely in your browser — nothing is uploaded, stored or logged.
What ratios do AA and AAA require?
AA needs 4.5:1 for normal text and 3:1 for large text (≥18.66px bold or ≥24px). AAA needs 7:1 and 4.5:1. UI components and graphics need at least 3:1.
How is the ratio calculated?
Using the official WCAG formula: (L1 + 0.05) / (L2 + 0.05), where L1/L2 are the relative luminance of the lighter and darker colors.
Is it really free?
Yes — free, with no signup, no watermark and no limits.