It appears the major issue was not actually x2go, as after running into the color problem on multiple systems that were built by others, using a fresh Centos/Rhel install made the colors work properly while using xterm. It seems there is
something fundamentally wrong with the existing system in regards to how it’s using the rgb.txt file and x2go connecting to it, though what that is right now I am not entirely sure.
Brian Town
Landsat 8
Goddard Space Flight Center