border-bottom-color
概述
border-bottom-color
属性设置一个元素底部边框的颜色。应当指出,在多数情况下,CSS 简写属性 border-color
或 border-bottom
更方便实用。
初始值 | currentcolor |
---|---|
适用元素 | all elements. It also applies to ::first-letter . |
是否是继承属性 | 否 |
计算值 | computed color |
Animation type | a color |
语法
border-bottom-color: yellow;
border-bottom-color: #F5F6F7;
值
<color>
- 一个描绘底边的颜色的 CSS
<color>
值。 inherit
- 一个代表父元素底边颜色的关键字(可能和
border-bottom-color
默认值不同)
正式语法
border-bottom-color =
<color>
<color> =
<absolute-color-base> |
currentcolor |
<system-color> |
<device-cmyk()>
<absolute-color-base> =
<hex-color> (en-US) |
<named-color> |
transparent |
<rgb()> |
<rgba()> |
<hsl()> |
<hsla()> |
<hwb()> |
<lab()> |
<lch()> |
<oklab()> |
<oklch()> |
<color()>
<device-cmyk()> =
device-cmyk( <cmyk-component>{4} [ / <alpha-value> ]? )
<rgb()> =
rgb( [ <percentage> | none ]{3} [ / [ <alpha-value> | none ] ]? ) |
rgb( [ <number> | none ]{3} [ / [ <alpha-value> | none ] ]? )
<hsl()> =
hsl( [ <hue> | none ] [ <percentage> | none ] [ <percentage> | none ] [ / [ <alpha-value> | none ] ]? )
<hwb()> =
hwb( [ <hue> | none ] [ <percentage> | none ] [ <percentage> | none ] [ / [ <alpha-value> | none ] ]? )
<lab()> =
lab( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ / [ <alpha-value> | none ] ]? )
<lch()> =
lch( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <hue> | none ] [ / [ <alpha-value> | none ] ]? )
<oklab()> =
oklab( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ / [ <alpha-value> | none ] ]? )
<oklch()> =
oklch( [ <percentage> | <number> | none ] [ <percentage> | <number> | none ] [ <hue> | none ] [ / [ <alpha-value> | none ] ]? )
<color()> =
color( <colorspace-params> [ / [ <alpha-value> | none ] ]? )
<cmyk-component> =
<number> |
<percentage>
<alpha-value> =
<number> |
<percentage>
<hue> =
<number> |
<angle> |
none
<colorspace-params> =
<predefined-rgb-params> |
<xyz-params>
<predefined-rgb-params> =
<predefined-rgb> [ <number> | <percentage> | none ]{3}
<xyz-params> =
<xyz-space> [ <number> | none ]{3}
<predefined-rgb> =
srgb |
srgb-linear |
display-p3 |
a98-rgb |
prophoto-rgb |
rec2020
<xyz-space> =
xyz |
xyz-d50 |
xyz-d65
示例
一个带有边框的简单 div
HTML 内容
<div class="mybox">
<p>This is a box with a border around it.
Note which side of the box is
<span class="redtext">red</span>.</p>
</div>
CSS 内容
.mybox {
border: solid 0.3em gold;
border-bottom-color: red;
width: auto;
}
.redtext {
color: red;
}
结果
规范
规范 | 状态 | 注释 |
---|---|---|
CSS Backgrounds and Borders Module Level 3 border-bottom-color |
Candidate Recommendation | 无重大变化,不过 transparent 关键字被正式移除,该关键字现在被包含在已扩展的 <color> 里。 |
CSS Level 2 (Revision 1) border-bottom-color |
Recommendation | 初始定义 |
浏览器兼容性
BCD tables only load in the browser
另见
- 边框相关的 CSS 简写属性
border
,border-bottom
和border-color
。 - 用于其它边框颜色相关的 CSS 属性:
border-right-color
,border-top-color
, 和border-left-color
。 - 同样用于底边的其它边框相关的 CSS 属性:
border-bottom-style
和border-bottom-width
。