I believe the difference in color is too great with the white and brown. Why? 3 reasons 1. The products that are cemented to the building you will not redo anytime soon. Messy , dirty, expensive and just not worth the trouble  2. When you add a product to the building structure. Windows , floors they must last a long time. Durability, wear and tear, and STYLE. All equal a story of when the home was designed.  The look over a period of time 10 years + and the home will become "out of date" Needs a face lift . 3. The homes we admire, the Museums, Churches, Libraries, Opera House have one common thread. At a glance they are timeless. Built in 1940, 1990 etc  The crystal clear item is not seen  For this reason I would not go "trendy". Generally our first choice is the right one. Simple and elegant  How do you change this ad time moves on. Color Bedroom a change of bedspread. Bathroom towels become a dark navy or  deep forest green. Yellow for spring  Paint a wall blue, hang a piece of art  The change is simple and your money well spent for resale  Take a moment to do another board  Remove the brown and replace with a neutral. Try an Odegard runner - There are so many options  Enjoy

IMO on a ranch keep the siding simple and I like vertical. As for the bathroom use the same 12 x24 on the shower walls as the bathroom floor and I hate bullnose for trim unless you have avery traditional style in the bathroom I much prefer a simple schluter trim that is virtually invisible and I really do not care what my tiler likes its not his house. I also do not like mixing creams and whites it often just looks a mess when finished Keep it simple you will like it a lot longer.BTW the siding color for the new addition the same as all the rest of the siding .

@Sabrina Alfin - I already found the tile liners that match my carrara marble! I was concerned about finding it easily because so much tile that’s labeled “carrara” is from China - not Italy (like my shower tiles). I thought I might have to special order them - but my friend who does a little interior design work called her friend in the tile business - and she has some that she can get to me on Monday or Tuesday! Thanks for the suggestion! I like these liners SO MUCH more than the rounded pencil tiles!

If this is the wall that is predominant when you're in the room (but not in the shower) I think I would be disappointed as well. From what I can see it looks like a better job was done on the long wall. However, the short wall doesn't mesh with the long wall. I used a smaller tile in my shower, but he wrapped it from one wall to another in a consistent fashion. Tile setting is as much an art as a trade. However, this size tile is used frequently, so he can't say he's unfamiliar with it. He must do it this way on all his jobs! It's worth a discussion with the contractor, but I don't know if you'll be able to get it redone for free.