What does orange mucus mean?
The best I’ve found on the same question is either a sinus infection or stagnation. The longer the mucus stays in your sinus cavities, the darker it can become. If it’s accompanied by facial pain or headache, it’s probably an infection needing attention (usually antibiotics although you can also try home remedies). If not, a netti pot or saline with lots of nose blowing is worth a try.