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shepanator t1_iyhys0f wrote

You could measure the wavelengths of light being reflected by an object from a known broad spectrum light source (i.e. it emits light across the entire spectrum). I don't know if there is an official standard for this, but it would be the closest you could get to measuring an objects 'true' colour.

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thickskull521 t1_iykju0a wrote

There are standard weightings for illuminants, yes. D65 I believe is the most common.

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