For given wavelength lambda, calculate corresponding the color coordinates (rounded to 4-decimals) in CIE 1931 color space.
Example:
Input: lambda = 532
Output: xy = [0.1702, 0.7965]
Refer to:
https://en.wikipedia.org/wiki/CIE_1931_color_space
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Last Solution submitted on May 29, 2026

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