Hi Maurício,
Yes, with the ChimeraX color command, for example something like:

color electrostatic #1 map #2  palette -10,red:0,white:10,blue

…where the protein with surface is #1 and the DelPhi map is #2. 

There are other possible options, see:
<http://rbvi.ucsf.edu/chimerax/docs/user/commands/color.html#map>

You can open the DelPhi file in all the usual ways (File… Open or “open” command). We read the .phi files from the academic version.  Here are the known map types:
<http://rbvi.ucsf.edu/chimerax/docs/user/commands/open.html#volume>

When you open the map it may show isosurfaces, which you can hide by clicking the “eye” icon near the upper left corner of the Volume Viewer panel.
<http://rbvi.ucsf.edu/chimerax/docs/user/tools/volumeviewer.html>

I hope this helps,
Elaine
-----
Elaine C. Meng, Ph.D.                       
UCSF Chimera(X) team
Department of Pharmaceutical Chemistry
University of California, San Francisco

> On Sep 14, 2018, at 10:26 AM, Maurício Menegatti Rigo <mauriciomr1985@gmail.com> wrote:
>
> Hi,
> is there a way to color the protein surface according to Electrostatic Potential, just like we do with Chimera ("Electrostatic Surface coloring" under "Tools"). The input potential file was calculated with Delphi.
> Thanks in advance,
> Maurício Menegatti Rigo, Ph.D.
> Brazil