The subject of colored mucus is confusing to me. People mention it as a sign of exacerbation and yet my pulmonologist said when you have Bronchiectasis you can produce colored mucus routinely so he does not count that as exacerbation. He looks more to how you feel such as very tired and no appetite etc. I produce brownish colored mucus every day and yet when last treated with an antibiotic that worked it did clear up to light yellow and way less quantity. But it just builds back up over time which he said is typical with Bronchiectasis. Anyway I suppose it just depends on the person and what defines an exacerbation for them.