Fungal sinusitis mucus can vary in color, but it is often yellow, green, or brown. The color can depend on the type of fungus causing the infection and the severity of the infection.
It's important to note that not all mucus of these colors indicates fungal sinusitis. Other conditions like bacterial sinusitis and allergies can also cause discolored mucus.
If you are experiencing discolored mucus, persistent sinus pain, or other symptoms, it's important to see a doctor for a diagnosis and treatment plan.