Understanding Poop Color Meaning: Gut Health from Your Stool Stool Colors and What They Can Tell You Your stool color can carry important clues about digestion, diet, or even disease. Most shades are harmless, but some changes signal the need for Decisions: A 20 year old male with dark stool Department of Emergency Medicine Saint John Nobody likes to talk about this. The color of your stool matters because it leaves behind clues on your digestive health. When digestion is working well, bile flows properly, fats are absorbed,