主要目的是营造一种家庭般令人放松的感觉，因此航空公司倾向于使用柔和的颜色，给人一种像家一样的、自然而朴实的感觉。

The principal aim is to create a home-like relaxing feel, so airlines tend to use soft colors that feel domestic, natural and earthy for that reason.

youdao

紫色是艺术家们钟爱的颜色。

Purple is often preferred by artists.

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一家公司计划开发一种原型除草机，它使用带有光学传感器和微处理器的刀片，通过颜色的深浅区别杂草和作物。

A company plans to develop a prototype weeding machine that uses cutting blades with optical sensors and microprocessors that distinguish weeds from crop plants by differences in shade of color.

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As I say, there's a certain instability which could never apply in the semiotics of the stoplight because there it's not so much a question of but rather the insistence that the color is just that color.

我承认，颜色的选择有时候是有规律的,但是在语义学上这解释不通,因为他们不考虑,但是语义学家认为颜色只单纯表示颜色。

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