Cool colors make people think of cool and chilly colors like blue, green and purple.

冷色使人们想起清凉或寒冷，如蓝色，绿色和紫色。

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red, yellow, orange) are preferred on backgrounds of cool colors (e.g. blue, green, purple) and vice versa.

实验研究显示，暖色调（比如红、黄、橙）非常适合作为冷色调（比如蓝、绿、紫）的背景，反之亦然。

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In a cool climate, its appears pure blue, but darkens to a purple when the temperature rises.

在凉爽的气候下，它呈纯蓝色，但随着温度的升高，它会变暗，逐渐呈现出紫色。

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The latest sea-surface height measurements reveal unusually cool water (shown as blue and purple) and sea levels that are two to seven inches below normal, extending from the Gulf of Alaska along the coast of North America.

CNN: satellite image