I am generating pdfs with Perl and PDF::API2. How can I get my pdf to be CMYK? Currently my pdfs all come out as RGB according to ImageMagick’s identify command.
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I am generating pdfs with Perl and PDF::API2. How can I get my pdf to be CMYK? Currently my pdfs all come out as RGB according to ImageMagick’s identify command.
PDF::API2 allows colors to be entered as RGB or CMYK, and will output whatever you pass into it.
To enter a CMYK color, use the pattern
%CCMMYYKKinstead of#RRGGBB(note the percent sign instead of the number sign).For example, you can set “true black” as follows:
PDF::API2::Util also has an undocumented RGBtoCMYK function. I have no idea if it’s accurate, and it’s undocumented, so use at your own risk, but it might be useful as a one-time way to convert your existing RGB colors to CMYK.