(a2ps.info)Colors in PostScript
8.4 Colors in PostScript
Nevertheless, here are some tips on how to design your PostScript
styles. It is strongly recommended to use `gray.pro' or `color.pro' as
There are two PostScript instructions you might want to use in your
new PostScript prologue:
this instruction must be preceded by a number between 0 (black)
and 1 (white). It defines the gray level used.
this instruction must be preceded by three numbers between 0 (0 %)
and 1 (100%). Those three numbers are related to red, green and
blue proportions used to designate a color.
a2ps uses two higher level procedures, `BG' and `FG', but both use
an argument as in `setrgbcolor'. So if you wanted a gray shade, just
give three times the same ratio.
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