When it comes to a Mid-Century Modern wall, there are a few options: wallpaper, paint and wood covered seem to be most common. For wallpaper there are a lot of patterned designs, some no more than 3 colors. Then there are the paints varying from whites, creams or light greys for rooms that need to feel spacious. The popular bold statement colors are greens, teals, and oranges.
Like the walls, the floors in a Mid-Century Modern home also have many options but in general are very clean. Although Epoxy floors can be delicate it creates a clean and simple look. For wood floors, the narrow plank hardwood floors live up to the era. If you are looking for tiles for the kitchen, you would go with large-scale tiles. The tiles should stay in the natural color tone: white, beige, gray, and/or black. If you decide on carpet, choose neutral colors with tight knotted styles to give it a subtle texture.