Colors schemes only include values that are currently being used in the model. If a value is no longer used it is immediately removed from the color scheme, along with the assigned color and pattern. Later if the same value is used again it is assigned a new random color.
This makes it impossible to setup template colors schemes by office standards in empty files. One work around to this is creating placeholder rooms/areas, but this is far from an ideal solution.
It would be much better if values entered into color schemes remained even if they are not used by the current model.