Ubuntu
xorg package

  1. Bug #300935 (rgb.txt)
  2. Comment #1

Comment 1 for bug 300935

Revision history for this message
Alberto Milone (albertomilone) wrote : Re: non-existent rgb.txt file and broken link to it

I have looked at the package and it contains the file in /usr/share/X11/. Maybe try this command?
sudo apt-get install --reinstall x11-common