2.80 solid mode with materials?

Im trying to do some sculpting of some terrain.

I have setup a special material which shows me a different color for everything bellow the z axis, and another for everything above the z axis as a sculpting guide. But blender will not display this material in the solid mode, no matter what settings I change…

Is it possible to get solid mode, with a material?

Thanks

In effect, I want to combine these two views: