Hi,
In the new Publisher, we no longer have to choose a color model for your publication.
The color mode has been simplified in the new version, and now we can use RGB mode for all cases, enhanced to export additional color information when saving the publication.
For more information, please refer:
Unfortunately, the blog is wrong.
Printers in the UK want CMYK colours - and the RGB is just a fob off.
In the stand alone Publisher 2010/2013 it is possible to go into Info and "Choose Color Mode" where one can change to CMYK.
For some reason, once again Server based Publisher 2013 does not offer this "Choose Color Mode" option