Why are the walls of tourist buildings on the seaside often white, and the tops often red and green?

1. The answer given in the textbook: It is in harmony with the environmental background and is the foundation of the bright colors on the top. It is set against the blue sky and white clouds and is neither dim nor dazzling under the sunlight;

2. The walls of seaside buildings should be white with high reflectivity, which is easy to identify and reduce the impact of the scorching sun on the heating of the building; the tops should be red or green to appear bright and beautiful.