color

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概述

CSS中的 颜色/color 属性可设置元素文本内容及其装饰 decorations（如文本下划线）的前景色。这不会对该元素的其余任何特性造成影响。实际上，若不考虑历史因素及其在CSS中的显示等级，它本应当被称作 text-color 。

The color property sets the foreground color of an element's text content, and its decorations. It doesn't affect any other characteristic of the element; it should really be called text-color and would have been named so, save for historical reasons and its appearance in CSS Level

1. 

请注意颜色值必须是统一的，这可能包含将来CSS中设置的透明值。它不可以是梯度渐变 <gradient> 的或是CSS中的图像 <image>  。

Note that the color value must be a uniform color, which may include a transparency value from CSS3 onwards. It can't be a <gradient> which is an <image> in CSS.

初始值Varies from one browser to another
适用元素all elements. It also applies to ::first-letter and ::first-line.
是否是继承属性yes
计算值If the value is translucent, the computed value will be the rgba() corresponding one. If it isn't, it will be the rgb() corresponding one. The transparent keyword maps to rgba(0,0,0,0).
Animation typea color

语法 / Syntax

/* A CSS Level 1 color */
color: red;

/* The only color added in CSS Level 2 (Revision 1) */
color: orange;

/* CSS Level 3 color, sometimes called a SVG or X11 color */
color: antiquewhite;

/* The color 'lime' with the 3-character dash notation */
color: #0f0;

/* The color 'lime' with the 6-character dash notation */
color: #00ff00;

/* A color using the available functional notations */
color: rgba( 34, 12, 64, 0.3);

/* Use the color of this element's direct ancestor */
color: currentcolor;

color: inherit;

Values

<color>
Is a <color> value giving the color of the textual elements of the element.

Formal syntax

<color>
where 
<color> = <rgb()> | <rgba()> | <hsl()> | <hsla()> | <hex-color> | <named-color> | currentcolor | <deprecated-system-color>
where 
<rgb()> = rgb( <percentage>{3} [ / <alpha-value> ]? ) | rgb( <number>{3} [ / <alpha-value> ]? ) | rgb( <percentage>#{3} , <alpha-value>? ) | rgb( <number>#{3} , <alpha-value>? )
<rgba()> = rgba( <percentage>{3} [ / <alpha-value> ]? ) | rgba( <number>{3} [ / <alpha-value> ]? ) | rgba( <percentage>#{3} , <alpha-value>? ) | rgba( <number>#{3} , <alpha-value>? )
<hsl()> = hsl( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsl( <hue>, <percentage>, <percentage>, <alpha-value>? )
<hsla()> = hsla( <hue> <percentage> <percentage> [ / <alpha-value> ]? ) | hsla( <hue>, <percentage>, <percentage>, <alpha-value>? )
where 
<alpha-value> = <number> | <percentage>
<hue> = <number> | <angle>

Examples

The following are all ways to make the element's text red:

element { color: red }
element { color: #f00 }
element { color: #ff0000 }
element { color: rgb(255,0,0) }
element { color: rgb(100%, 0%, 0%) }
element { color: hsl(0, 100%, 50%) }

/* 50% translucent */
element { color: rgba(255, 0, 0, 0.5) } 
element { color: hsla(0, 100%, 50%, 0.5) }

Specifications

Specification Status Comment
CSS Transitions
color		 Working Draft Defines color as animatable.
CSS Color Module Level 3
color		 Recommendation Deprecated system-colors; added SVG colors; added rgba(), hsl(), hsla() functional notation.
CSS Level 2 (Revision 1)
color		 Recommendation Added the orange color and the system-colors.
CSS Level 1
color		 Recommendation

Browser compatibility

We're converting our compatibility data into a machine-readable JSON format. This compatibility table still uses the old format, because we haven't yet converted the data it contains. Find out how you can help!
Feature Chrome Firefox (Gecko) Internet Explorer Opera Safari
Basic support 1.0 1.0 (1.7 or earlier) 3.0 3.5 1.0
Feature Android Firefox Mobile (Gecko) IE Phone Opera Mobile Safari Mobile
Basic support 1.0 1.0 (1) 6.0 6.0 1.0

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