Pick a colour within the CMYK gamut or deal with spot colours. It's only one colour so it's not a huge deal, just be aware that anything you need that has to be CMYK isn't going to be the same colour,...
You have a PDF. You want to work with this PDF in illustrator, so you open it (in illustrator). The problem is that the PDF had text in a font you don't have installed. So you can't see the piece properly
But after all, when you open the file as a PDF, you SEE the text in the proper font it was supposed to. So the information is in fact in the PDF.
The question is: Can the font be converted to path and then be opened nicely in illustrator?
Of course I can make a snapshot of the font and re-trace it by hand... but that's not the idea, as the information is already in the PDF.
If you have the full version of Acrobat do a save as, choose eps, click the "options" button and select "transparency flattening" ... then chekct he box that says "convert all text to outlines". If you open the .eps in Illustrator it should work, but it gave me the font warning even though it had been converted.
See if that works.
I like to beat up pacifists, because they don't fight back ...
When you open it in illy does it tell you what font is missing? As far as outlining fonts, never done it AcroPro, I embed them, but you need the font to do that. Maybe you can find a font that's similar and replace it.