We are in the process of adding a sunroom over an existing raised deck and new deck to the side and stairs. The builder asked us how we want to 'finish' the bottom of the sunroom.
Our house and the material of the outside of the room are both taupe colored. Deck will be grey composite and railings will be white.
The builder suggested white around the bottom (not sure what to call this space but it clearly needs to be covered as you can see where our old deck railings were attached.

I just don't want the finish part to look 'cheapy'. And I cannot find pictures of this anywhere.

Anyone know how to make this look nice?