highlighting a range on a mesh plot

This question is sort of related to the other one I had posted here.

I am using three arrays to create a 3D mesh surface plot (a bit of background, the mesh plot is supposed to show variability in my data).

The three arrays are: dH_df, p and f, all sizes 31x20.

I have an additional matrix array that will include a range of values from dH_df that show the greatest potential for data variability.

The range is supposed to visually highlight the corresponding region in mesh surface plot (ie the range will appear a different colour on the plot).

what method could be used to do this?

Thank you.