Name
  page:GetCMYKFill -- get CMYK filling color
Synopsis

      t = page:GetCMYKFill()

Function
  `page:GetCMYKFill()` returns the current value of the page's filling color. `page:GetCMYKFill()` is valid only when the page's filling color space is `#HPDF_CS_DEVICE_CMYK`.

  This function returns a table with the following fields initialized:

  `C`
    Cyan level of color.
  `Y`
    Yellow level of color.
  `M`
    Magenta level of color.
  `K`
    Black level of color.

  All fields contain values between 0 and 1.

Inputs
  none

Results
  t
    current CMYK filling color

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