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Tom Utilities

Comprobador de contraste de color

Utilidades para desarrolladores

Mide los ratios de contraste WCAG y comprueba si el texto cumple AA y AAA para texto normal y grande.

Cómo usar

Check a pair of colors

Pick a foreground and background color. The tool shows the contrast ratio and pass or fail badges for each WCAG level.

  1. Choose the text color.
  2. Choose the background color.
  3. Aim for at least 4.5:1 for normal text.

WCAG thresholds

Normal text needs 4.5:1 for AA and 7:1 for AAA. Large text (18pt or 14pt bold) needs 3:1 for AA and 4.5:1 for AAA.

Preguntas frecuentes

What counts as large text?

WCAG defines large text as at least 18pt (24px) or 14pt (18.66px) when bold.

Is a higher ratio better?

Yes. A ratio of 21:1 is the maximum, achieved by black text on a white background.