The color models
CMYK colors are stored in 32-bit format. When printed or output as EPS or PDF they are output in CMYK format.
CMYK colors and transparency effects
When using any effect that involves transparency, including feathering, color calculations are performed in RGB. This is also true of live effects.
PDF Export Filter Settings: General Options
Color Model
The color encoding standard for the PDF document can be selected from
RGB and
Native. The
Native option represents colors in the PDF file as they are specified in the drawing using RGB and/or CMYK.
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