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在CSS面板中的Rules view规则视图,如果样式规则包含颜色值,颜色值的旁边会显示一个颜色样板。


The color picker includes an eyedropper icon: clicking this icon enables you to use the eyedropper to select a new color for the element from the page:

Starting in Firefox 40, clicking the color sample while holding down the Shift key will change the color format:


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