I've got bright white walls, ceiling, floor and window coverings. As much white as possible with black velvet behind the enlarger only. With old eyes I need as much light as I can get and with all three safelights on I have tested totally paper safe.

As an extra bonus I've got a ceiling full of hundreds of glowing stars moons and constelations that were left over from when it was my teenage daughters's room. I do have to wait half an hour to load film because I don't trust those stars with film till they fade.