gnome-colour-manager requires cups which pulls in a lot of dependencies. This causes massive dep issues. Printing is only one place where color setup of devices would be useful and where printers would never be used such as media centres and Moblin devices where printing isn't supported.

Also the spec file is using Requires against the packaging guidelines "RPM has very good capabilities of automatically finding dependencies for libraries and eg. Perl modules. In short, don't reinvent the wheel, but just let rpm do its job. There is usually no need to explicitly list eg. Requires: libX11 when the dependency has already been picked up by rpm in the form of depending on libraries in the libX11 package. "

https://fedoraproject.org/wiki/Packaging/Guidelines#Requires

All of these dependencies should be calculated by the rpm build system automatic requires and shouldn't need to be listed explicitly. 

Requires:  gtk2 >= %{gtk2_version}
Requires:  unique >= %{unique_version}
Requires:  dbus-glib >= %{dbus_glib_version}
Requires:  dbus-x11
Requires:  udev
Requires:  vte
Requires:  lcms
Requires:  cups
Requires:  polkit
Requires:  PackageKit
Requires:  libcanberra >= %{libcanberra_version}

In the case of cups the dep of 'cups-libs' should be enough and is what most gnome printing related packages pull in.