[Scribus] Question regarding color management

[Matthias Schmitt]

Hello,

I am working with Scribus 1.2.3 on Mac OS X and really love this 
program. As I am not a DTP expert I have tried to understand the 
principles of color management, but I am still confused.

My document looks fine on the monitor. Color Management is activated 
using Adobe RGB (1998) for pictures, solid colors and monitor. For the 
printer I am using Europe ISO Coated FOGRA27, which I hope is fine for 
printing in Europe. Once I active the option "Simulate Printer on the 
Screen" all colors shift and look pale.

When I am exporting the PDF, once in RBG and once in CMYK, I can see a 
similar color difference between those files on the screen using my PDF 
viewer. What kind of file should I forward to the printing company?

Does this color difference indicate, that something is going wrong and 
my print will not work?

Thank you for any help you can give me.

Greetings from Luxembourg

Matthias Schmitt