I created a RSVP card for a friend and in the AI file the color is NAVY Blue but when I save as a PDF and attach it on the email it is black. Does anyone know a solution?
Many applications have an issue with spot colors or overprints.
For example, Preview or Mail on the MacOS can't display overprints or spot colors correctly in PDf files.
There is nothing you can do to make the applications display spots or overprints correctly. The only solution is to use an app which supports proper PDF display such as Acrobat or Reader, or change your artwork so it does not include spots and overprints.