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The **relative‑luminance** package is a tiny Node.js library that computes the WCAG‑defined relative luminance of a color given as an RGB array (0‑255 per channel), returning a value between 0 and 1. It’s aimed at developers who need to assess color contrast programmatically—e.g., for accessibility testing or UI tooling.

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tmcw/relative-luminance

Calculate the relative luminance of an RGB triplet color.

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