比如计算机显示器在某一点上显示青色，它实际上会在一个特定区域上都亮起蓝色和绿色像素。
If a computer monitor displays cyan, it actually lights up both blue and green pixels in a given area.
之后再进行橙色、黄色、绿色、青色、蓝色，最后是紫色。
Then move to orange, then yellow, green, blue, indigo and violet.
此外，主机名为root时是红色，为普通用户时为绿色，提示符中的其余部分则设置为青色。
In addition, the hostname is colored in red when it is root, green when it is a normal user, and the remainder of the prompt is colored in cyan.
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