Knauf shape ceiling designs can be painted with various colors. It can be white, blue, or even in several different colors like sky ceiling theme or wood ceiling theme. It depends on the theme of the house or room. The study and also easy to design material of Knauf is the reason on why people use it a lot for their ceiling to beautify their house. The one that is usually used by people is the round or rectangular shape ceiling with some accent in the edges of the ceiling and in the corner of the room to place the lamp. This design is very simple but still elegant for various theme of the room. Living Room.