colour purity

例句：

1. 1. The painting has a variety of colours.
   这幅画有各种颜色。
2. 2. She wore a bright red dress for the party.
   她穿着一件鲜艳的红色连衣裙参加派对。
3. 3. The sunset painted the sky with shades of orange and pink.
   日落将天空染成了橙色和粉色的渐变。