The use case here is to render something other than a Success/Failed state.
The UI supports Flows in a Finished state, though you need to return it using a state handler. For example:
from prefect import Flow, task from prefect.engine.state import Finished def handler(obj, old_state, new_state): if isinstance(new_state, Finished): return Finished("finished") else: return new_state @task() def mytask(): return 1 with Flow(name="POC2", state_handlers=[handler]) as flow: mytask()
which will render as Blue in the UI