This practice should be called color bar.

这个应该叫调色练习吧。

A value of 100 corresponds to the full length of the visible color bar.

值为100对应的是可见的颜色条的全长。

Listing 2 demonstrates some of the ways the appearance of the color bar can be customized.

清单2举例说明了定制颜色条外观的一些方法。

Color of the snow and rock. Click the color bar to choose a different color from the color Chooser.

积雪和岩石的颜色。单击颜色条从颜色选择器中选择不同的颜色。

Color bar original for image reproduction was designed and printed respectively after GCR and UCR color separation.

设计了用于图像复制的色标图原稿，对该原稿分别进行GCR与UCR分色后进行输出。