Why do earthy colors advocate honesty?

Because most people on the mainland are honest.

The five elements of earth are loyalty, gentleness, honesty and trustworthiness. Numerology, Five Elements and Tuwang are people who like to use God. They are honest, credible and easy to gain the trust and support of others. People who are too prosperous in the five elements are stubborn, inflexible and lack ambition. Being too rigid will hinder your career development. It can be seen that the wealth of the five elements is not necessarily a rich life. Too much credit and too much attention to interpersonal relationships make you gullible. Bad luck, encountering unscrupulous profiteers who have been cheated, hindered the development of their own career.