Fan Casting Earth Is Yellow in Sort by Tropes

Yellow earth is commonly seen in Eastern works because the color is considered culturally significant. China sees yellow as a very important color; it has historically been worn only by emperors and Buddhist monks, it represents earth in their element system, and it's the color of the soil deposits that come from the Yellow River, which is the cradle of Chinese civilization. In real life, sand in deserts and some beaches is a light tint of yellow, and soil can be a golden yellow if iron oxide is present. Yellow ochre, which contains iron oxide, is extracted from that soil for pigment — it's the earliest example known to be used by mankind.