Source: Gong Zizhen's Miscellaneous Poems in the Sea. Red "colorful is always spring." (Zhu's Spring Day) Purple
"Take the heart of Dan and follow history." (Wen Tianxiang's "Ding Ding Yang") Qing
A line of egrets rose into the sky. "(Du Fu quatrains) White
"In spring, the river is as green as blue." (Bai Juyi's Memory of Jiangnan) Blue.
"Dark clouds have crushed the city and want to destroy it." (Li He's Yan Men Tai Shou Hang) Black
The spring breeze is green, and so is Bogua Prefecture in Jiang Nanan (Wang Anshi in the Northern Song Dynasty).