Because the color of black walnut was also used in the decoration a few years ago, my personal feeling is:

1, white and black walnut is more comfortable, but the light barley color is also good, you can try it. Colored walls are not suitable for black walnut, which is not harmonious.

2. The second bedroom can be light yellow.

3. It is best to choose a slightly darker color for the background wall to match the black walnut, because the black walnut has a more prominent sense of China, and the modern sense of China can be considered for decoration.

You can refer to the July issue of New Room magazine, which seems to have this name, a magazine of Xi 'an. The first one above is that modern Chinese decoration is very beautiful.