《黄帝内经·素问·经络论》
岐伯说：心主赤，肺主白，肝主青，脾主黄，肾主黑，这些都是与其所属经脉的常色相应的。
岐伯曰：心赤，肺白，肝青，脾黄，肾黑，皆亦应其经脉之色也。
Qi Bo said: Heart master red, lung master white, liver master green, spleen master yellow, kidney master black, these are all corresponding to the usual color of their respective meridians.