Worked on the w3c/csswg-drafts repository to address a nuanced issue in the CSS Color module, focusing on the ΔE2000 color difference calculation. Implemented a targeted fix in JavaScript to correct the conditional logic for hue weighting when one chroma value is zero, ensuring more accurate color difference results and aligning with the CSS Color specification. The solution demonstrated a strong grasp of color theory and mathematical rigor, resulting in improved fidelity across sample implementations. Delivered as a single, well-documented commit, the change minimized risk and enabled rapid validation without broad code modifications, reflecting a precise and efficient engineering approach.