Systems, methods, and devices for indicating a status of a vehicle or a seat in a vehicle are disclosed herein. A system includes a plurality of seats in a vehicle, a light-diffusing fiber optic light source attached to at least one of the seats, a receiver configured to receive a status of at least one of the seats, and a controller. The controller may be configured to determine an illumination scheme based on the status of at least one of the seats and illuminate the light-diffusing fiber optic light source according to the illumination scheme.