If you have a persistent change in the color of your stool or have noticed that you have brown poop or grey poop or black, tarry stools or red, bloody stools, may indicate intestinal bleeding, and evaluation is required. If that is the case, one should notify their doctor or visit an emergency room. Gray poop or clay-colored stool, light brown stool, and yellow stool also may signify diseases of the pancreas, gallbladder, or liver or bile duct blockage. Stool color can represent a health condition. Therefore, it is crucial to consult with a doctor.