Color Management with X on Linux

Color management of your monitor is possible with digiKam from version 0.9.0 onwards, but it is slow. The better and more fundamental way is to include the display color management in your X server using profiles. Then all other applications will profit as well.

This site explains it all, go there for the installation procedure and the How-To's.

Note:
The best way to color-manage the display is to establish a custom profile and use that one, a procedure to be repeated every other year or so for aging reasons. But if you go the easier way and use the profiles delivered from the manufacturer, it is paramount to do a normalization as described for example on the alpenglow web site.