What color is suitable for the ceiling of kitchen and bathroom in geomantic omen?

The five elements of the bathroom belong to water, which is suitable for white and black.

The five elements in the kitchen belong to fire, and generally speaking, black is the most taboo.

The color is best determined according to the position. Compared with the kitchen in the south, the south itself is relatively hot and it is not suitable to use red or blue. It is more appropriate to choose white at this time.