[PyMOL] How may I color surface using spectral palette ?

[Enrico M. <jms...@gm...>]

Dear All,
I am working on the visualization of the transparent surface in my
model. For the moment I found only one possibility for non-monotone
coloring palette of the surface, using
cmd.set('surface_color', 'default')
How may I color the surface using some spectrum (e.g. from orange to
yellow) or alternatively according to the electrostatic properties of
the amino-acids?
Thank you in advance
Enrico