SELECTION OF COLOUR FOR DOORS
Question: What colour is suitable for the main door and doors of an apartment?
Answer: Lighter shades are better, as it represents cleanliness; while darker shades are less ideal as it represents grimness which could entail some degree of disaster and unhappiness. It is just like prison doors which are usually dark in colour; if an iron gate is painted black, it represents obstacles.
Source: Master Jun Hong Lu’s Discourse (Question 244), 4 August 2018