I found this color picker package, gpick, reviewed in a random blog. It uses GTK+ so I think I can use it on Fedora. Unfortunately there is not yum package in the normal repositories. There is an OpenSUSE repository that reports to have the package, but I've never used OpenSUSE distro packages on my Fedora distro. Not sure what to make of it.
What do I need to know before I try to install this from the maintainer's source or from the OpenSUSE repository?