You shouldn't be rigid on this point and think that you have to paint each "area" in a particular color. The geomantic card in its different approaches, the colours associated with the cardinal directions and the study of the elements gives us a varied and sometimes contradictory information about the colours to use.
Imagine you follow the the method that assigns the colour according to the theory of the 5 elements and its relationship to the cardinal directions. You have to locate the dining room in the northern part which is symbolized by the water element and thus with the colours blue and black. If this dining room has few windows and little natural light it would be a terrible mistake to follow the recommendations that dictate the previous association as it would turn the dining room of your home into something cold and without movement. The following are some ideas and quick guidelines for the usage of the colour, applied to certain rooms of the accomodation and types of personnel characters.