If you have just opened a diaper and found orange stool staring back at you, you can relax. Orange baby poop is one of the most normal, benign stool colors in the entire spectrum. It is not a sign of infection, allergy, intolerance, or anything that should keep you up at night — well, anything beyond the normal reasons a baby keeps you up at night.
Baby stool comes in a remarkable range of colors, and most parents cycle through surprise, concern, and eventually nonchalance as they realize just how varied normal can look. Yellow, orange, green, brown, tan — all of these are just different shades of "bile pigments mixing with food pigments and gut bacteria doing their job." Orange falls squarely in the normal category.
That said, understanding why your baby's poop is orange can be reassuring, and knowing which stool colors actually do warrant attention is valuable context. So let us walk through the common causes of orange stool, the situations where you might want to mention it to your pediatrician (spoiler: they are rare), and the stool colors that genuinely matter.
One critical note up front: white, pale, or chalky stool is the one color that is never normal. If you ever see stool that is the color of white clay or putty — with no pigment at all — contact your pediatrician immediately, as this can indicate a serious bile duct or liver condition. Orange, however, is not that. Orange means bile is present and doing its job.