Stool Color Chart: What Each Poop Color Means

When you glance in the toilet, color is one of the fastest signals your body gives you. Most shades are perfectly ordinary, but a few are worth a second look. Use this stool color chart as a quick reference for what each color usually means and when a color is a red flag rather than a leftover from last night’s dinner.

The quick answer

Brown is the healthy, normal stool color. Green and yellow are usually harmless, although greasy yellow stool that keeps returning can mean fat is not being absorbed well. The three colors to take seriously are black and tarry, bright red or bloody, and pale or clay-colored. These can point to bleeding in the digestive tract or a problem with bile flow, and they deserve prompt medical attention.

Brown: the normal color

Most healthy stool sits somewhere in the brown range, from light tan to deep brown. The color comes from bile, a fluid your liver makes to help digest fat. As bile passes through your gut, bacteria and enzymes break it down into pigments that give stool its brown shade. Small day-to-day shifts within brown are normal and usually just reflect what you ate and how quickly things moved through you.

Green: usually harmless

Green stool often comes from leafy greens, green food coloring, or food moving through the gut quickly so that bile has not finished breaking down. On its own, with no other symptoms, green is generally nothing to worry about and passes on its own.

Yellow or greasy: watch if it repeats

An occasional yellow stool is common. But yellow stool that looks greasy, smells especially foul, and is hard to flush can mean your body is not absorbing fat well. A single episode is usually not a concern. If greasy yellow stool keeps happening, mention it to a doctor.

Black or tarry: take seriously

Black, sticky, tar-like stool can come from harmless sources like iron supplements or bismuth-containing medicines. But it can also mean bleeding higher up in the digestive tract, where blood darkens as it travels down. If you are not taking iron or bismuth, treat black tarry stool as urgent.

Red or bloody: get it checked

Bright red can come from beets or red food coloring and clear quickly. It can also be blood from lower in the gut, the rectum, or hemorrhoids. Streaks on the surface of the stool or blood in the toilet water are worth attention, and a doctor should sort out the cause rather than you guessing.

Pale or clay-colored: not normal

Stool that is pale, gray, or clay-colored can mean little or no bile is reaching your gut, which may reflect a problem with the bile ducts or liver. A one-off can follow certain medicines, but stool that stays pale should be checked.

When to see a doctor

Most color changes are harmless and fade within a day or two once the food or supplement behind them passes. Some, though, are red flags. Contact a doctor right away for black, tarry stool or bright red or bloody stool, since both can signal bleeding in the digestive tract. See a doctor as well if your stool stays pale, gray, or clay-colored, which can reflect a bile duct or liver issue. This article is general information, not medical advice, so let a clinician interpret any warning sign in your own situation.

How bellySignal helps

Colors are easy to notice and just as easy to forget by your next appointment. With bellySignal you can log your Bristol stool type (1 to 7), your stool color, and any blood or mucus, alongside food triggers and free-text notes. You can also track urine color for hydration and your water intake in the same place. Everything stays on your device, private to you, with no account and no upload. Logging color next to the foods, supplements, and medicines you took makes it far easier to tell a diet-driven color from a real warning sign, and to give a doctor clear detail instead of a vague memory.