Thanks for your query to health care magic. Since echo, ecg, oxygen
level are normal there doesn't seem to be any serious problem. She is probably fine. She doesn't have any heart diease which can be one cause of dark purple lips. Environmental temperature also can result in blue lips which need not be worried. A look at her hemoglobin
levels can be done. Otherwise there seem to be no cause for concern. Gastric reflux
medications need to be taken which will respond well to medications.
Dr. Balaji Chinnasami MD
Assistant Professor, Pediatrics