the colour bar

例句：

1. 1. The color bar is used to indicate the boundaries of different colors on a fabric.
   颜色条用于指示织物上不同颜色的界限。
2. 2. The color bar in the store helps customers find their desired shade.
   商店里的色条帮助顾客找到他们想要的颜色。
3. 3. The color bar was designed to make it easier for people to match their clothes.
   这个色条的设计是为了让人们更容易搭配衣服。