Describe symbolism in No Exit by Jean-Paul Sartre

The few objects (props) present in the room have symbolic meaning, especially in defining the characters. The sofas are of different colors "wine-colored, blue, and green", and Estelle insists on taking the blue one because it matches her dress. This choice symbolizes her superficiality. Estelle also uses the paper knife to stab Inez. Although it is ineffective, it leads to Estelle's acceptance that she is truly dead and in hell. The bronze statue serves a similar purpose for Garcin. It symbolizes the futility of escape because it is too heavy to move. Garcin also obsesses over the bell, which symbolizes a link with the outside world. Unfortunately, it does not always ring.