Undefined color: "black"
Symptom
Running emacs under Fedora Core 5 results in the error message below:
Undefined color: "black"
Solution
In Fedora Core 5, the RGB map file, rgb.txt has been moved to /usr/share/X11. But the X configuration file uses a different search path (/usr/X11R6/lib/X11).
To fix the problem, comment out the RGB search path in /etc/X11/xorg.conf as shown below:
# RgbPath "/usr/X11R6/lib/X11/rgb"
Afterward, restart the X Server by pressing Ctrl-Alt-Backpace simultaneously.