CSS3常用的几种颜色渐变模式总结

一、线性渐变：linear-gradient

语法：

        <linear-gradient> = linear-gradient([ [ <angle> | to <side-or-corner] ,]? <color-start>[, <color-end>]+)
        <side-or-corner> = [left | right] || [top | bottom]
        <color-start|end> = <color>[ <length>|<percentage>]?

下述值用来表示渐变的方向，可以使用角度或者关键字来设置：

<angle>：用角度值指定渐变的方向（或角度）。

to left：设置渐变为从右到左。相当于: 270deg

to right：设置渐变从左到右。相当于: 90deg

to top：设置渐变从下到上。相当于: 0deg

to bottom：设置渐变从上到下。相当于: 180deg。这是默认值，等同于留空不写。

<color-start|end> 用于指定渐变的起止颜色：

<color>：指定颜色。

<length>：用长度值指定起止色位置。不允许负值

<percentage>：用百分比指定起止色位置。

示例：

div {      width: 200px;      height: 100px;      margin: 10px 5px;      border: 1px solid #ddd000;  }  #LinearStartToEnd {    float:left;    background: linear-gradient(#ff0000, #00ff00);  }  #LinearPercentage {    float:left;    background: linear-gradient(#0000ff, #ff0000 52%, #00ff00);  }  #LinearAnglePercentage {    float:left;    background: linear-gradient(90deg, #ff0000 20%, #00ff00 50%, #000000 80%);  }  #LinearAngle {    float:left;    background: linear-gradient(30deg, #ffff00 30%, #ff0000, #00ff00);  }  #LinearTopRight {    float:left;    background: linear-gradient(to right top, #00ff00, #ff0000 50%, #0000ff);  }

二、径向渐变：radial-gradient

语法：

     <position> = [ <length>① | <percentage>① | left | center① | right ]? [ <length>② | <percentage>② | top | center② | bottom ]?
     <shape> = circle | ellipse
     <size> = <extent-keyword>|[<circle-size>||<ellipse-size>]
     <extent-keyword> = closest-side | closest-corner | farthest-side | farthest-corner
     <circle-size> = <length>
     <ellipse-size> = [ <length>| <percentage> ]{2}
     <shape-size> = <length>| <percentage>
     <radial-gradient> = radial-gradient([ [ <shape>|| <size> ] [ at <position> ]? , | at <position> , ]?<color-start>[[ , <color-end>]]+)

<position> 确定圆心的位置。如果提供2个参数，第一个表示横坐标，第二个表示纵坐标；如果只提供一个，第二值默认为50%，即center

<length>①：用长度值指定径向渐变圆心的横坐标值。可以为负值。

<percentage>①：用百分比指定径向渐变圆心的横坐标值。可以为负值。

<length>②：用长度值指定径向渐变圆心的纵坐标值。可以为负值。

<percentage>②：用百分比指定径向渐变圆心的纵坐标值。可以为负值。

center①：设置中间为径向渐变圆心的横坐标值。

center②：设置中间为径向渐变圆心的纵坐标值。

left：设置左边为径向渐变圆心的横坐标值。

right：设置右边为径向渐变圆心的横坐标值。

top：设置顶部为径向渐变圆心的纵坐标值。

bottom：设置底部为径向渐变圆心的纵坐标值。

<shape> 确定圆的类型

circle：指定圆形的径向渐变

ellipse：指定椭圆形的径向渐变。

<extent-keyword> circle | ellipse 都接受该值作为 size。

closest-side：指定径向渐变的半径长度为从圆心到离圆心最近的边。

closest-corner：指定径向渐变的半径长度为从圆心到离圆心最近的角。

farthest-side：指定径向渐变的半径长度为从圆心到离圆心最远的边。

farthest-corner：指定径向渐变的半径长度为从圆心到离圆心最远的角。

<circle-size> circle 接受该值作为 size。

<length>：用长度值指定正圆径向渐变的半径长度。不允许负值。

<ellipse-size> ellipse 接受该值作为 size。

<length>：用长度值指定椭圆径向渐变的横向或纵向半径长度。不允许负值。

<percentage>：用百分比指定椭圆径向渐变的横向或纵向半径长度。不允许负值。

示例：

#RadialCenterCircle {    float:left;      background: radial-gradient(circle at center, #ff0000, #ffff00, #00ffff);  }  #RadialClosestSide {    float:left;      background: radial-gradient(circle closest-side, #ff0000, #00ff00, #ffff00);  }  #RadialFarthestSide {    float:left;      background: radial-gradient(farthest-side, #ff0000 20%, #ffff00 60%, #00ff00 80%);  }  #RadialRightTop {    float:left;      background: radial-gradient(at right top, #ff0000, #ffff00, #00ff00);  }  #RadialRadiusCenter {    float:left;      background: radial-gradient(farthest-side at top right, #ff0000, #ffff00, #01fefe);  }  #RadialGroup {    float:left;      background:          radial-gradient(farthest-side at top right, #ff0000, #ffff00, #009f00, transparent),          radial-gradient(60px at top left, #ff0000, #ffff00, #00ff0e);  }

三、重复的线性渐变：repeating-linear-gradient

语法和参数类似线性渐变，这里不在赘述。详情请参考CSS手册。

示例：

#RepeatingLinearPercentage{    float:left;      background: repeating-linear-gradient(#ff0000, #00ff00 10%, #000000 15%);  }  #RepeatingLinearRight {    float:left;      background: repeating-linear-gradient(to right, #ff0000, #00ff00 10%, #000000 15%);  }  #RepeatingLinearAngle {    float:left;      background: repeating-linear-gradient(45deg, #ff0000, #00ff00 10%, #0000ff 15%);  }  #RepeatingLinearBottomLeft {    float:left;      background: repeating-linear-gradient(to bottom left, #00ffff, #ff0000 10%, #00ff00 15%);  }

四、重复的径向渐变：repeating-radial-gradient

语法和参数类似径向渐变，这里不在赘述。详情请参考CSS手册。

示例：

#RepeatingRadialCircle {    float:left;      background: repeating-radial-gradient(circle, #ff0000 0, #00ff00 10%, #0000ff 15%);  }  #RepeatingRadialTopLeft {    float:left;      background: repeating-radial-gradient(at top left, #ff0000, #00ff00 10%, #0de0f0 15%, #ffff00 20%, #000000 25%);  }  #RepeatingRadialClosestCorner {    float:left;      background: repeating-radial-gradient(circle closest-corner at 20px 50px, #00ff00, #ff0000 10%, #00ffff 20%, #ffff00 30%, #ff00ff 40%);  }

完整的例子：

<!DOCTYPE html>  <html>  <head>  <meta charset="utf-8" />  <title>ImageCSS3</title>  <style>  div {      width: 200px;      height: 100px;      margin: 10px 5px;      border: 1px solid #ddd000;  }  #LinearStartToEnd {    float:left;    background: linear-gradient(#ff0000, #00ff00);  }  #LinearPercentage {    float:left;    background: linear-gradient(#0000ff, #ff0000 52%, #00ff00);  }  #LinearAnglePercentage {    float:left;    background: linear-gradient(90deg, #ff0000 20%, #00ff00 50%, #000000 80%);  }  #LinearAngle {    float:left;    background: linear-gradient(30deg, #ffff00 30%, #ff0000, #00ff00);  }  #LinearTopRight {    float:left;    background: linear-gradient(to right top, #00ff00, #ff0000 50%, #0000ff);  }    #RadialCenterCircle {    float:left;      background: radial-gradient(circle at center, #ff0000, #ffff00, #00ffff);  }  #RadialClosestSide {    float:left;      background: radial-gradient(circle closest-side, #ff0000, #00ff00, #ffff00);  }  #RadialFarthestSide {    float:left;      background: radial-gradient(farthest-side, #ff0000 20%, #ffff00 60%, #00ff00 80%);  }  #RadialRightTop {    float:left;      background: radial-gradient(at right top, #ff0000, #ffff00, #00ff00);  }  #RadialRadiusCenter {    float:left;      background: radial-gradient(farthest-side at top right, #ff0000, #ffff00, #01fefe);  }  #RadialGroup {    float:left;      background:                  radial-gradient(farthest-side at top right, #ff0000, #ffff00, #009f00, transparent),                  radial-gradient(60px at top left, #ff0000, #ffff00, #00ff0e);  }    #RepeatingLinearPercentage{    float:left;      background: repeating-linear-gradient(#ff0000, #00ff00 10%, #000000 15%);  }  #RepeatingLinearRight {    float:left;      background: repeating-linear-gradient(to right, #ff0000, #00ff00 10%, #000000 15%);  }  #RepeatingLinearAngle {    float:left;      background: repeating-linear-gradient(45deg, #ff0000, #00ff00 10%, #0000ff 15%);  }  #RepeatingLinearBottomLeft {    float:left;      background: repeating-linear-gradient(to bottom left, #00ffff, #ff0000 10%, #00ff00 15%);  }    #RepeatingRadialCircle {    float:left;      background: repeating-radial-gradient(circle, #ff0000 0, #00ff00 10%, #0000ff 15%);  }  #RepeatingRadialTopLeft {    float:left;      background: repeating-radial-gradient(at top left, #ff0000, #00ff00 10%, #0de0f0 15%, #ffff00 20%, #000000 25%);  }  #RepeatingRadialClosestCorner {    float:left;      background: repeating-radial-gradient(circle closest-corner at 20px 50px, #00ff00, #ff0000 10%, #00ffff 20%, #ffff00 30%, #ff00ff 40%);  }    </style>  </head>  <body>  <!-- 指定线性渐变起止色 -->  <div id="LinearStartToEnd"></div>  <!-- 指定线性渐变起止色位置 -->  <div id="LinearPercentage"></div>  <!-- 指定线性渐变颜色渐变方向和起止色位置 -->  <div id="LinearAnglePercentage"></div>  <!-- 指定线性渐变颜色渐变方向 -->  <div id="LinearAngle"></div>  <!-- 设置渐变从右上到左下 -->  <div id="LinearTopRight"></div>    <!-- 浮动Div换行，此处指定Div宽高和边界，是为了覆盖前面定义的Div统一CSS样式，   可以尝试去掉指定的Div宽高和边界，看看效果 -->  <div style="width:0; height:0; border:none; clear:both"></div>  <!-- 以中心点为圆心的圆形径向渐变 -->  <div id="RadialCenterCircle"></div>  <!-- 径向渐变半径长度：圆心到离圆心最近边的长度 -->  <div id="RadialClosestSide"></div>  <!-- 径向渐变半径长度：圆心到离圆心最远边的长度 -->  <div id="RadialFarthestSide"></div>  <!-- 左边为径向渐变圆心的横坐标值,顶边为径向渐变圆心的纵坐标值 -->  <div id="RadialRightTop"></div>  <!-- 同时指定径向渐变的圆心和半径 -->  <div id="RadialRadiusCenter"></div>  <!-- 径向渐变组合 -->  <div id="RadialGroup"></div>    <div style="width:0; height:0; border:none; clear:both"></div>  <!-- 指定颜色起止色位置的重复线性渐变 -->  <div id="RepeatingLinearPercentage"></div>  <!-- 从左到右渐变的重复线性渐变 -->  <div id="RepeatingLinearRight"></div>  <!-- 渐变角度为45度的重复线性渐变 -->  <div id="RepeatingLinearAngle"></div>  <!-- 从左下到右上的重复线性渐变 -->  <div id="RepeatingLinearBottomLeft"></div>    <div style="width:0; height:0; border:none; clear:both"></div>  <!-- 圆形重复径向渐变 -->  <div id="RepeatingRadialCircle"></div>  <!-- 渐变方向为左上到右下的重复径向渐变 -->  <div id="RepeatingRadialTopLeft"></div>  <!-- 重复径向渐变：渐变半径长度为从圆心到离圆心最近的角的距离 -->  <div id="RepeatingRadialClosestCorner"></div>    </body>  </html>