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An in-depth exploration of accurately rendering the visible light spectrum on computer displays. The author identifies flaws in common spectrum visualizations (color banding, incorrect hues, wrong brightness), then develops a mathematically rigorous solution using CIE color matching functions, XYZ color space, and sRGB conversion. The work addresses perceptual effects like the Abney effect through manual correction against real spectral sources, and culminates in open-source rendering code capable of visualizing arbitrary spectral distributions, including a periodic table of atomic emission spectra.

Rendering the Visible Spectrum