Byte
Buenos Aires 05:20 p. m.

Color contrast checker (WCAG)

Contrast between text and background is measured as a luminance ratio, from 1:1 to 21:1. The WCAG 2.2 guidelines require at least 4.5:1 for normal text and 3:1 for large text (24 px, or 18.66 px bold) at level AA; level AAA raises it to 7:1 and 4.5:1.

Sample heading

This is how a paragraph reads with this color combination.

Contrast ratio
14,08 : 1
Normal text AA (4.5:1)Pass
Large text AA (3:1)Pass
Normal text AAA (7:1)Pass
Large text AAA (4.5:1)Pass
Icons and borders (3:1)Pass

It runs in your browser. Nothing you enter is sent to any server.

Common mistakes

  • Light grey text on white: it looks elegant and can't be read.
  • Brand red as small text on black.
  • Text over photos without a layer that ensures contrast.

Shall we talk?

Tell us about your product and current setup and we'll send a written proposal with phases, scope and every cost.

Sell into Argentina.

Byte runs sales and import delivery in Argentina for companies abroad. Tell us about your product and current setup, and we'll recommend where to start.

© 2026 Byte Argentina, Buenos Aires One team. One written plan. One chain, end to end.