《吕氏春秋·纪·季夏纪》
它的雾气有的上不连天，下不连地，有的上大下小，有的像水的波浪，有的像山的林木。春天是黄色的，夏天是黑色，秋天是苍色，冬天是红色。
其气有上不属天，下不属地，有丰上杀下，有若水之波，有若山之楫；春则黄，夏则黑，秋则苍，冬则赤。
Its fogs are sometimes not connected to the sky and not connected to the ground, some are larger above and smaller below, some are like water waves, and some are like trees on the mountains. Spring is yellow, summer is black, autumn is blue, and winter is red.