[XeTeX] Outputing PDFs in CMYK ColorSpace

[Peter Dyballa]

Xcolor works with XeTeX. The actual problem is in the xdvipdfmx output  
driver. Or a "colour models support" file for the driver.

Actually /usr/local/texlive/2009/texmf-dist/tex/xelatex/xetex-def/ 
xetex.def leaves all RGB/CMYK/HSB colour definitions unchanged and  
passes this material to the output driver, as \special's – and they  
all fail with CMYK, xdvipdfmx and xdv2pdf, the old Mac OS X zombie. Or  
it's my screen which makes which causes the different look of the  
colours. The xcolor package comes with a few test files in /usr/local/ 
texlive/2009/texmf-dist/doc/latex/xcolor, see the README file. For  
some tests you'd need to change the test files, for example the driver  
for the graphics or geometry packages.

Another option is to study the documentation of dvipdfm and use its  
\special's...

--
Greetings

   Pete

Experience is what you get when you don't get what you want.