If the colour of a small area in the earth element zone is changed, or an imbalancing item is kept there, does it affect the whole house?
Yes, it affects the whole house. Just as dirt in one room spreads its smell through the air to the other rooms, an imbalance in one zone spreads to the entire house.
Related questions
What exactly is ivory colour?
Ivory is a very light yellow. Off-white is often called ivory, but do not choose plain off-white; true ivory is a very light shade of yellow. It represents the earth element, which is why ivory floor tiles generate so much energy in a house.
Which element does the blue colour represent?
As a planet colour, blue belongs to Shani (Saturn); as an element, it represents the water element.
Can a bedroom be made at Shikhi (E1), and why should it be white rather than red?
Yes, a bedroom at Shikhi can suit elderly people, and it should be painted white rather than the zone's red colour, as advised for people of kapha nature and for those of pitta nature whose heat rises quickly. Shikhi is highly sensitive and already hot, so red would add heat and open the third eye.
Can a false ceiling be painted blue, and will it cause problems?
Light sky blue that matches the colour of the sky can be used and causes no problem. If the blue is dark, paint small twinkling stars on it to nullify its effect.
Can blue be used in the North-West?
Light green or a shining lustre white is better than blue in the North-West.
Can the ceiling be painted brown?
Not at all. Brown on the ceiling starts representing fire in the space element.