Why can't I match a screen color?

[Bill Campbell]

On Thu, Sep 08, 2011, Boaz Bezborodko wrote:
>I'm working on an older screen that has a bright blue background.  I 
>want to edit it by adding to the screen, but I can't get the same color 
>using the color commands in the help.
>
On *nix machines, there's an 'rgb.txt' file that maps X11 color
names to RGB values.  Location may vary.  Here's the file name on
several *nix systems we have here:

OS                        File
SuSE Linux Enterprise 9   /usr/X11R6/lib/X11/rgb.txt
OS X Snow Leopard         /usr/X11/share/X11/rgb.txt
CentOS 5                  /usr/share/X11/rgb.txt
OpenServer 5.0.6a         /usr/lib/X11/rgb.txt

There are 87 different lines for blue in one of these I just checked.

Bill
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