There are actually other spectrums built into the PyMOL. To use one
of them, type
spectrum palette=<palette_name>, selection=<selection>
The list of built-in palettes are in cmd.py of the code. All seem to
be multi color; so there are none that are just different shades of
Mark A. Saper, Ph.D.
Associate Professor of Biological Chemistry
Biophysics Research Division, University of Michigan
Chemistry Building Room 3040
930 N University Ave
Ann Arbor MI 48109-1055 U.S.A.
sa...@umich.edu (734) 764-3353 fax (734) 764-3323
Biophysics Interdepartmental Graduate Program: http://www.umich.edu/