tex: \index{read colornames} -->

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`read colornames from RGB "\filename"'
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Read colornames from named file, which is in the X11 format.  This
format has 4 or more columns, the first three giving the red, green and
blue values in the range 0 to 255, and the last columns giving the
colorname (which may have more than one word).  You can create colors
yourself or read