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by warrenm 1093 days ago
Sounds like you found a typo (since Wikipedia[0] lists "luminance" vs "lightness")

Why don't you message the creator (Nate Baldwin[1][2]), and bring it up?

...though since the creator referenced not only the Wikipedia article, but several others on that site, perhaps it's not a typo?

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[0] https://en.wikipedia.org/wiki/Helmholtz%E2%80%93Kohlrausch_e...

[1] https://colorandcontrast.com/#/references

[2] https://natebaldw.in