The end of the article says "Blue Wuzhen, blue dream". Why is Wuzhen said to be "blue"? "Blue Wuzhen"

This question is a bit difficult~because everyone has different opinions~~As a Wuzhen native, I can tell you my opinion

1 I think Wuzhen is an ancient town of water. As the name suggests, Wuzhen is a water town. Most of the water is relatively clear, which can reflect the blue sky and white clouds and give people a comfortable feeling. Blue is one of the three primary colors. Compared with the other two primary colors, blue should give people a feeling of comfort and tranquility.

2 There is a specialty product in Wuzhen called blue calico. After the blue calico is made, it needs to be dried. The white cloth and blue flowers floating in the wind are caressed by the breeze and are illuminated by it for those who stop to watch. Deeply attracted

(The above are just my personal opinions) I wonder if the poster agrees?

~~Hope to adopt~~~