发紫

例句：

1. 1. The flowers are turning into a deep purple color.
   这些花正在变成深紫色。
2. 2. The sky turned a beautiful shade of purple over the city.
   天空在这座城市上空变成了美丽的紫色。
3. 3.The leaves on the tree have started to turn a vibrant purple.
   树上的叶子开始变出鲜艳的紫色。