Dear ChimeraX team,

I am colouring a PAE plot from a predicted multiprotein structure.

From: https://www.cgl.ucsf.edu/chimerax/docs/user/tools/alphafold.html 
Color plot from structure – color the plot to match the 3D structure where the pair of entities represented by an X,Y point have the same ribbon color; show the rest of the plot in shades of gray

I would like to use the correct values of the shades of grey to make a legend for the plot. Is there a way to see these? Is it possible to include the used palette info on the page above (as for rainbow and green)?

Ideally, I would also like to change these shades of grey to have something a bit "steeper" (for example: 0 black, dark grey 5, grey 10, light grey 15, white 30). Is this already possible, or can it be added as a new palette or -ideally- as a customisable feature?

Thanks a million! 
Pim