CSS3颜色渐变模式总结
1.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); }2.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); } -
3.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%); }3.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>参考：CSS参考手册：http://css.doyoe.com/
