Set 16 default colors:  see gibney$:[idl]window_colors.pro


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Widget colors:

  Requires modifications both in unix/Vms environment and within
  the idl procedure.

  o Idl procedure assigns 'resource_name' at widget creation.
    For example:
        ww = Widget_Text(base,value='woof',resource_name='Text2')

  o Separate resource file contains definitions specific
    to the colored widgets.  For example
        File:  xx.rsrc
        Idl*Text2*background: red

  o Use xrdb to merge the new definitions in with default
    definitions :
        > setenv RESOURCE_FILE   ~/xx.rsrc
        > xrdb -merge $RESOURCE_FILE