| Definition: | the three empirical laws that describe colour-matching properties of additive mixtures of colour stimuli:
1. To specify a colour-match, three independent variables are necessary and sufficient.
2. For an additive mixture of colour stimuli, only their tristimulus values are relevant, not their spectral compositions.
З. In an additive mixture of colour stimuli, if one or more components of the mixture are gradually changed, the resulting tristimulus values also change gradually
NOTE – Grassmann's laws do not hold for all observing conditions.
|