color postscript files from .rgb files

[Marie de C]

In 4Dgifts, there is a utility 'tops' which allows the translation of 
a .rgb file into a .ps file. However all the colors become halftone grays.
Does anyone have a utility which transforms a color .rgb file into a color .ps
file to be printed on a color postscript printer?
	marie at max.physics.sunysb.edu