The adjective "pale" has several meanings, depending on its context. It can refer to something that is light in color or hue; for example, a pale yellow or a pale blue. In this sense, it means not bright or vivid, but rather subdued and muted.
In another usage, "pale" can describe someone who appears sickly or unhealthy due to lack of exposure to sunlight or other natural light sources; in this context, the word implies a lack of color or vitality in one's complexion.
The term can also be used figuratively to mean weak or insufficient; for example, "a pale attempt" at something would indicate that it was not very successful or convincing.