Green stool + vegetarian diet = freaked out. Is that normal?

Green stool bad? The color of stool varies with foods, speed of emptying of the GI tract, medications & supplements ingested, gut flora (unique for each individual), additives (like blood), subtractions (like absent bile), infection, inflammation, & other factors. Consider what you consumed in the last few days. If the green color is unusual for you & persists, or is accompanied by other symptoms, see your doctor.