I am in the process of building a darkroom for B&W and I am getting to the point where I'm thinking about wall and ceiling colors. I am thinking about painting the wall behind the enlarger flat black. I'm thinking about painting the opposite wall, with the sink a medium gray (a few shades lighter than battleship gray). I have a Thomas safelight that will be turned off while working with the enlarger. I also have two other Kodak bullet type safelights that will be used constantly. I have not decided on a color for the ceiling. I have read comments on this subject in the past but I don't recall where. Any feedback would be appreciated.