What does it mean to use different colors for Feng Shui Compass 24 Mountain?

The color is actually black and red. Twenty-four mountains are actually twenty-four dragons, and one mountain is composed of three dragons, namely heaven and earth. Tianyuan Dragon is the same as Long Yuan's Yin and Yang, but Long Yuan is different. Red represents three dragons as yang. If it is black, it means yin. The difference between yin and yang of three dragons is mainly that stars fly in the air, clouds fly in the air and clouds fly in the air.