If it’s brown
Porphyrias are a rare class of disorders that typically involve sensitivity to light and can on the odd occasion lead to brownish urine (due to the way red blood cells are broken down in the bodies of people with the condition). However, if your brown pee is accompanied by abdominal pain, rashes, or seizures, it’s possible you have the genetic condition. Brown urine could also be a sign of something serious, like a tumor. Or if you’re a huge rhubarb or fava bean fan, you might also notice cola-colored pee after you’ve eaten those foods.