Colour is fun but I don't feel yellow brown will be an inviting foil to the cream. Wood in that tone would be fine. How do you want to feel in your room? Fresh light airy? The. Go white. Cool edgy look - then add colour but be brave. Tomato red or Sea Blue or Coral.

If you want to highlight the staircase wall then your could use earthy colours such as a yellow ochre! The wall could be enhanced even more by using suitable frames and making a good collage composition for all the photos that you have (I can see many lying on the dining table). This colour would match well with wooden furnitures

Does it complement the paint colour or does it look awful? If you don't like it then paint the room or return the sofa for a new colour.

Pictures attached for 3 bathrooms, first 2 are from same bath