Well, my mother had a kidney transplant 18yrs. ago and what I can remember your kidneys filter all fluids therefor if you have been drinking a lot of soda or something I beleive that could change your output color. I would try drinking ALOT of water to flush out your Kidneys. And by all means make sure you are going to the potty often.
It could be hepatitis. Better see your doctor and don't wait. Good luck!
could be blood in your urine there are many possabilities on what it could be if it is maybe kidney infection you should be going to your doctor.