Relative luminance

Client

WCAG relative luminance from #RRGGBB hex.

L ≈ 0.125065

Nearby workflows on Toolcore

  • WCAG contrast ratio — Contrast ratio between two #RRGGBB colors. when color values need conversion, contrast review, or theme export.
  • sRGB to linear — Convert sRGB channel 0–255 or 0–1 to linear RGB. 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.
  • HSL to RGB — Convert HSL degrees and % to RGB 0–255. when color values need conversion, contrast review, or theme export.

About this tool

sRGB relative luminance for contrast 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.