This section of the example applies a linear gradient to the background color so that the color transitions from yellow to orange to red.

范例的这一部分会将线形渐层套用至背景色彩，色彩就会由黄色转换为橘色再转换为红色。

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Style details: a yellow base background color with hints of orange at the top and bottom.

样式细节：一种橄榄色的基本的背景颜色与五谷类型作用在每封信件。

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The couple sat in silhouette, framed by a large picture window, while the setting sun turned the background shades of yellow, orange, magenta and deep purple.

FORBES: Knowing When to Back Off