After using seasonal table cloths in my room for many many years, the fire inspector decided this year to ban them. Yet, I see classrooms with all kinds of furniture from home, lamps, stuff draped all over, and nothing is said about that!
Find out from the fire marshall if fabric that has been sprayed with a fire retardant would be allowed. If so choose a neutral color. It still puzzles me that the background paper is considered more flammable then the papers posted on them. We were required to spray curtains used to cover shelves yet had tons of paper in the rooms.
In our district, the fire marshals are very strict with older schools. Soft furnishings must be clearly labeled by the manufacturer as being flame retardant. At one time, we were able to treat soft furnishings with a special spray. That is no longer allowed. On the flip side, the newest schools can't put anything on their newly constructed walls. Old schools can have 10% of the walls covered. Nothing can hang from the ceilings in any of our schools.