Contour 3D Mesh

Thanks a lot @chris for your reply! You guys were just fantastic in Copenhagen few weeks ago! :smiley:
Regarding the topic yes, it seems that component is not giving me any contour line that I want on my curved surface but following this other similar topic here:

is there way to at least cluster the colours instead of having a whole gradient from red to blue through yellow, just with those 3 colours as shown in this picture here?

but on a curved surface/mesh?
Thanks again
Cheers

Enrico