Treatise on Military Preparedness

If the sun's color appears black, green, white, or yellow, the army will be defeated.

If the sun loses its natural luster, the state will not flourish.

If the sun changes color: if an army is currently deployed, that army will be crushed; if no army is in the field, there will be mourning for a death or the King will fall ill.

When the sky is clear and still, lacking any drifting vaporsoriginal: 游氣 (yóuqì). Atmospheric mists or "floating breaths" believed to be omens of cosmic imbalance rather than natural weather., yet the sun and moon are not bright, this is defined as "loss of color" and portends disaster. However, if drifting vapors obscure the sky and cause the sun and moon to lose their color, this is merely a sign of coming wind and rain.

If the sun appears white and lusterless, there will be little rain within the month, portending a drought.

If the sun is red and lusterless, blood shall flow like rivers throughout the world; the state will fall into chaos and the military will be filled with anxiety. If the sun is as red as blood, it signifies a drought. This occurs when the body of smoke and clouds is black, shrouding and reflecting the sun's light to produce a crimson hue.

If the sun appears greenoriginal: 青 (qīng). A color category in ancient China that encompasses green, blue, and sometimes black; in this context, it refers to an unnatural, sickly pallor in the sky. and lusterless, the ruler's power will be usurped.