Ah yes, same! But impossible with Mapbox's 3d building layer. I can only style the buildings based on data inside that 3d buildings layer (like height). But the color of the neighboorhood is a different GeoJSON layer unfortunately. Only way would be to make my own 3d buildings layer and color each building, but getting 3d buildings for the whole world would be too much work.

I can definitely make the buildings transparent though! Will try that now, thanks