Final answer:
The nurse should report immediately if the stoma is purple, as it may indicate inadequate blood supply and potential complications.
Step-by-step explanation:
The nurse should report immediately if the stoma, which is the artificial opening created during a colostomy, is purple. A purple stoma indicates inadequate blood supply and could be a sign of ischemia or necrosis. This requires immediate medical attention to prevent further complications.
Learn more about Colostomy care