[Raku PDF Project] / [PDF-Class Module]
(Required) An array of three numbers [ XW YW ZW ] specifying the tristimulus value, in the CIE 1931 XYZ space, of the diffuse white point; see “CalRGB Color Spaces” on page 247 for further discussion. The numbers XW and ZW must be positive, and YWmust be equal to 1.0.
the CIE 1931 XYZ space, of the diffuse black point; see “CalRGB Color Spaces” on page 247 for further discussion. All three of these numbers must be non-negative. Default value: [ 0.0 0.0 0.0 ].
(Optional) An array of four numbers [ amin amax bmin bmax ] specifying the range of valid values for the a* and b* (B and C) components of the color. Component values falling outside the specified range are adjusted to the nearest valid value without error indication. Default value: [ −100 100 −100 100 ].