Download Adobe ICC profiles:
You will need to download the Adobe ICC profiles. The Adobe ICC profiles are used by all graphic design programs to set the colors correctly for CMYK Offset printing and establishing known RGB color space parameters. You will need to Install the profiles in order for Scribus to produce CMYK PDF files to the exacting PDF/X3 industry standard and for The GIMP to use the CMYK plug in.
To install these profiles in windows simply unpack the download and you will find a CMYK and RGB folder. Inside these folders you will find the profiles. To install simply right click on the profile and choose Install.