A touch of new green brings the meaning of spring.
A touch of new green means that your eyes suddenly light up and you see a piece of green. It is often used to describe spring, when the trees have just begun to sprout and the green leaves are very eye-catching. New green generally refers to the vegetation that has just sprouted in spring, and faint new green refers to a vibrant vegetation full of green.
Last winter, we planted many trees in the corner of the campus wall. At that time, we were worried about whether they would survive. When we went to Tomb-Sweeping Day, we were really excited to see a touch of new green.