Fêng shui

Fêng shui (pronounced ˌfʌŋˈʃweɪ, "fung-shway"), also formatted as feng shui, is a game mechanic in which HHA score and luck regarding items and money are increased based on the arrangement of furniture in the player's house. It is based on a practice originating from ancient China in which housewares are arranged in a certain way to increase the flow of positive energy throughout a house.

There are two ways to invoke fêng shui: placing items of certain colors in designated areas of a room or placing lucky items anywhere in a room.

Item color
Every item has a color assigned to it, but there are only three colors that affect fêng shui: red, yellow, and green. Feng Shui works by matching the color of the items to their appropriate squares in the room, or in and, the wall they hang on.
 * The two rows of tiles along the east (right) wall, and the wall itself, are red.
 * The two rows of tiles along the west (left) wall, and the wall itself, are yellow.
 * The two rows of tiles along the south (lower) wall, and the wall itself, are green.
 * The four tiles in the southeast corner are red/green.
 * The four tiles in the southwest corner are yellow/green.
 * Non-Feng Shui tiles in the middle of medium and large rooms.

Red
Red fêng shui increases item luck. One may find an increased number of items from outside one's furniture group in Tom Nook's store. Items are also more likely to fall when the player shakes trees.

Yellow
Yellow fêng shui increases money luck. This increases the number of Bells given to the player by villagers as rewards for helping them. Bells are more likely to drop when the player shakes trees as well as the number of Bells that fall increasing from 100 to 200. The number of Bells dropped from the money rock will also increase up to a max of 32,000.

Green
Green fêng shui increases overall luck.