《论衡·卷二·吉验篇》
高祖先到，项羽怨恨，范增说： 我叫人看了他的气象，气象都是龙、成青、黄、赤、白、黑五色，这全是天子的气象，要赶快杀掉他。 
高祖先至，项羽怨恨。范增曰： 吾令人望其气，气皆为龙，成五采，此皆天子之气也。
Liu Bang arrived first, arousing Xiang Yu's resentment. Fan Zeng said, "I had someone read his physiognomy, and his bearing and air contain the elements of a dragon, as well as the five colors of azure, yellow, scarlet, white, and black. These are all omens of an emperor. He must be killed at once.  