Re: [w3ctag/design-reviews] Wide gamut support for Canvas/OffscreenCanvas/ImageBitmap (#315)

> While these values may not correspond to physically realizable light spectra,

true, but not a problem

>  it is valid to do math on them (just like in the CIE XYZ space)

for some definition of valid. For example, unlike XYZ or linear sRGB, , this is not a linear-light space. So computing, for example, the color that results from mixing two lights of different colors will not give the correct result. (It may still be useful to do, especially if performance is more important than accuracy, but note that the errors are significant and certainly visible).

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