I would do black trim. What would be the point of white? It would stick out like a sore thumb against the black and negate the whole disappearing walls effect. And for those who advocate neutral walls, black is pretty neutral. :) ETA: Don't forget that your floors are light and will provide contrast. If you add contrast on the walls as well, it might make the wallpaper stand out in a way you don't want. Here are some pictures I found of both. It may help you decide which effect you prefer. Dark grasscloth walls, white trim above and below: Trim the same colour as walls(notice the dark floor as well): No trim, dark floor, white ceiling. I find the grasscloth wall disappears into the floor. Dark grasscloth and dark trim, dark floor:

do you have window coverings? And do you love them? What brand did you go with? House looks great. I read the link someone posted and brought up the black interior and decorating. I was thinking of just doing all black in the living areas and black out with white inside in the sleeping areas. Thanks for the quick response! :) Would love to see more pics of your house. Any idea what your exterior brand and color are?

I am also doing black windows on the house we are building (my absolute must have...LOVE the look 🤩). Mine will be white on the interior, but I agree with the other recommendations, I would stick with white, or off white, whatever your trim is. We had a house years ago, and went with a “fad” dark trim color. Worse mistake we ever made. When styles change, it’s really hard to change trim color. Just my 2 cents.

Wow, it really looks great! I know you just got rid of yellow on your house but have you considered a yellow door? It could be a homage to the old color and be a really great modern pop. Here's a mock-up of black window trim. I'm not a fan of the extreme contrast here. Not sure I like it as much as say, black windows. Your windows look like they are in good condition and don't need replacing, so that doesn't seem like a viable option.