What are the advantages of writing colors in Huanxisha Dragon Boat Festival?

"Huanxisha Dragon Boat Festival" is a sentence that Su Shi wrote to his concubine Chaoyun during the Dragon Boat Festival reunion.

In this word, "Blue Bay", "Red Jade Arm" and "Lv Yun Ring" are used to describe these colors.

The advantage of using "Blue Bay" is that for Chaoyun, Lu Xiujuan just fits her elegant and quiet personality.

The advantage of using "red jade arm" is that it is wrapped with colorful silk thread. I hope that the jade arm facing the cloud will live longer because of "red".

The advantage of using "Lv Yun Huan" is that I hope the cloud facing the cloud will be healthy because it is "green".