Do the colors of the couches in No Exit symbolize anything?
Like the people in the room, Garcin, Inez, and Estelle, the couches of "wine-red," "livid green," and blue clash with one another. They are also in the Second Empire style which is tediously overdone so as to irritate anyone who likes clean lines. Estelle complains that she "loathes angles" and Inez complains of the Second Empire style of furniture, remarking that "The room was all set for us." She also tells the others, "And they've put us together deliberately."
The few objects 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 best matches her dress. This symbolizes her superficiality.