Why is my bile a dark brown? I've had a cold for little over a week (cough, stuffy nose, phlegm, etc.) but I started to vomit yesterday. It contained the food that I had while watching the new SNL, so there was nothing weird there. I continued to vomit every six hours; I believe it's now reduced to twelve. The problem is that my vomit is now a dark brown. I did have root beer while watching SNL, but I believe that should be out of my system by now. I made the conclusion that it's bile, but it's never been this dark of a color before. I just want to know it's nothing I should worry about. Please help.