Color management

Step 1. Install and enable a CMS

The GNOME Color Manager is already installed in Ubuntu.

But you often need color profiles. The profiles in "Adobe ICC Profiles in RPM for Linux" are useful. Download the them from: ftp://ftp.adobe.com/pub/adobe/iccprofiles/linux/AdobeColorProfiles-end-u....

Unpack the archive (the tar.gz will unpack into a .rpm which you can once again unpack) and move the two files named "EuropeISOCoatedFOGRA27.icc" and "EuroscaleUncoated.icc" to ~/.color/icc (create the directory if it doesn't exist).

The two profiles are European standard-profiles for professional printing on coated and uncoated paper respectively.

Use "USSheetfedCoated.icc" and "USSheetfedUncoated.icc" for the USA.

Step 2. Calibrate the screen

Start up the GNOME Color Manager and attach a hardware calibration device to the computer. It is (hopefully) automatically detected and you are asked whether you want to install the additional software required for calibration.

After the software is installed, you are guided through the calibration process which take something like 10 minutes (for the “normal” calibration process). Use 6500K as the target white point (What white point temperature should I set my LCD monitor to?, Color temperature/Desktop publishing).

When finished you are asked to name the new profile (an ICC file) (Where does Gnome Color Manager store the ICM or ICC files?).

On Ubuntu, ICC files are saved in ~/.local/share/icc.

Step 3a. Configure Scribus

Scribus is installed via Ubuntu Software Center with the additional add-on “ICC-profiles for use with color profile aware software (icc-profiles)”.

For output you need an output ICC profile. You normally get this from your printer. In this case, we are going to assume that the printing press is using the "Euroscale Uncoated v2" ICC profile. For Inkscape, copy the ~/.color/icc/EuroscaleUncoated.icc profile to ~/.local/share/color/icc.

Copy the monitor profile obtained in the calibration step from ~/.local/share/icc. to ~/.color/icc. For Inkscape, copy the monitor profile to ~/.local/share/color/icc.

If Scribus is running, restart it so it finds the ICC profiles. Chose File > Preferences > Color Management and check Activate Color Management. Use the following settings:

  • RGB Images: sRGB IEC6i966-2.1
  • CMYK Images: Euroscale Uncoated v2
  • RGB Solid Colors: sRGB IEC6i966-2.1
  • CMYK Solid Colors: Euroscale Uncoated v2
  • Monitor: Select the monitor profile obtained in the previous step.
  • Printer: Euroscale Uncoated v2
  • Rendering intents > Images: Perceptual, Solid colors: Relative Colorimetric
  • Simulate printer on the screen: checked
  • Convert all colors to printer space: checked
  • Mark colors out of gamut: checked
  • Use blackpoint compensation: checked

Step 3b. Configure GIMP

Configure the GIMP color management (see Step 3b: Configure GIMP in the workflow description).

Step 3c. Configure Inkscape

Turn on color management in Inkscape (see Step 3c: Configure Inkscape in the workflow description) and use the "Euroscale Uncoated v2" profile as Device profile.