A client had a colostomy done one day ago. Which of the following is an abnormal finding when assessing the stoma?

A dark red color is an abnormal finding when assessing the stoma as it indicates inadequate blood supply, possibly due to ischemia. Mild edema, minimal bleeding, and a rose color are expected findings one day post colostomy surgery. Mild edema can be present due to tissue trauma and inflammation, minimal bleeding can occur initially, and a healthy stoma typically appears pink to red, known as a rose color, indicating good blood supply and tissue perfusion. Therefore, the dark red color is the abnormal finding in this scenario.