Changelog

All notable changes to this project are documented in this file.

The format is based on Keep a Changelog,
and this project adheres to Semantic Versioning.

[3.0.1] - 2026-09-12

CIEDE2000 rotation term (ΔΘ) was computed as exp(+x²) instead of
exp(-x²) because the negation was applied before squaring. This threw off
every result where the mean hue was not exactly 275°.
Hue-angle normalization was missing: atan2 returns (-180°, 180°] and the
stray % 360 was a no-op, so negative hue angles were never mapped into
[0°, 360°). This corrupted the mean-hue (h̄') branch of the formula.
8-digit #RRGGBBAA hex parsing extracted the wrong bytes (channels were
shifted by one byte); the top byte is now read with an unsigned >>> 24 shift.
adjustLightness now preserves the caller's original alpha instead of
always returning 1, matching its documented behaviour.
Address issues raised in #3

Together these fixes take the implementation from 22 of 34 failing official
Sharma, Wu & Dalal reference pairs to all 34 passing.

CommonJS export so the library works with require() in Node.js (browser
<script> global usage is unchanged).
Test suite (node:test) covering all 34 CIEDE2000 reference pairs plus the
colour-space conversions, run against both the readable and minified builds.
Coverage reporting via c8 and Allure report generation.
GitHub Actions CI running the suite with coverage on every push and PR.

Relicensed from Apache-2.0 to MIT (the package.json license field
previously and incorrectly declared ISC).
Updated dev toolchain: TypeScript ^7.0.2, esbuild ^0.28.2.
package.json metadata: correct main/types, keywords, engines,
files allowlist.

Full Changelog: v3.0...v3.0.1