Relative luminance

Client

WCAG relative luminance of a hex color.

Relative luminance: 0.1251 (#336699)

Nearby workflows on Toolcore

  • WCAG contrast checker — Foreground vs background: contrast ratio and WCAG AA/AAA for normal and large text. when color values need conversion, contrast review, or theme export.
  • WCAG AAA check — Pass/fail WCAG AAA (7:1 normal, 4. when color values need conversion, contrast review, or theme export.
  • Color tools — Hub for converter, harmony palettes, tint/shade scales, Tailwind-style theme, MUI createTheme palette, HeroUI-style CSS variables, WCAG c… when color values need conversion, contrast review, or theme export.
  • RGB percentages — Express a hex color as rgb() percentages. when color values need conversion, contrast review, or theme export.

About this tool

The L used in contrast-ratio math.

Common use cases

  • Relative luminance for quick local checks without uploading data.
  • Copy results into tickets, docs, or classroom notes.

Common mistakes to avoid

  • Unexpected input shape

    See the intro and how-to notes for accepted formats.

FAQ

Is processing local?

Yes—this runs entirely in your browser.

Agent prefill?

Use q or qb for the main text field when supported.

More tools

Related utilities you can open in another tab—mostly client-side.