Tristimulus Values

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Tristimulus Values (of a colour stimulus)

The amounts of the three reference or matching stimuli required to give a match with the colour stimulus considered, in a given trichromatic system.

Symbol: (Reference: C.I.E. 1931) X, Y, Z.

Reference: C.I.E. (extract)

Note: The quantities X, Y, Z refer to a field of vision of about 2 degrees. In 1964, quantities were defined by the Reference: C.I.E. to refer to a field of vision of about 10 degrees. These are denoted by the symbols X10, Y10, Z10.

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

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