My feces is a dark purple color. should i be worried? didn't eat anything that color nor red. please help. also i feel fine.

Gi: The change of stool color is serious. The dark purple, maroon, burgundy indicate blood. Once the dietary food intake is excluded. First see the medications like aspirin, plavix, coumadin, (warfarin) high fish capsule or vit. E are not there. Family history of colon ca. Stool should be checked guaiac for blood. The bleeding transit time is slow giving dark color. See gastrointestinal doctor in your area.