colord

colord is a system activated daemon that maps devices to color profiles.
It is used by gnome-color-manager for system integration and use when
there are no users logged in.

What colord does:

* Provides a DBus API for system frameworks to query, e.g.
  "Get me the profiles for device $foo" or
  "Create a device and assign it profile $bar"

* Provides a persistent key-file backed store that is preserved accross
  reboots.

* Provides the session for a way to set system settings, for instance
  setting the display profile for all users and all sessions.

See http://colord.hughsie.com/ for more details.