Comment 46 for bug 300935

As I mentioned earlier, IMHO trying to "fix" every single package that requires rgb.txt by supplying each of these packages with a standalone copy of said file would be a pretty...strange solution to the problem.
rgb.txt is the *definition* of a shared file, so all that is required is a place and package where rgb.txt is distributed with. Apparently somewhere a similar discussion happened in the past at least once, as rgb.txt already shifted places between the x11-common and xrgb packages, and probably others, in addition to several shifts within the filesystem itself.

So somebody should make a decision where to include the file (once), and where to place it in the FHS (e.g., /etc/X11 "Configuration files for the X Window System, version 11", or /usr/share "Architecture-independent (shared) data"). But there's no point in demanding that every package using this exact same file should include its own copy.