默认情况下，大多数浏览器在打印时会忽略CSS背景颜色和图像。这只能通过更改浏览器中的设置来覆盖，如果浏览器甚至有这样的选项（一些不，像昆汀指出）。

By default, most browsers ignore CSS background colours and images when printing. This can only be overridden by changing the setting in the browser, if the browser even has such an option (some don't, as Quentin points out).