如何在CSS3线性渐变中设置渐变停止点？

Question

在这个示例页面中看到灰色的条形。

http://dss.com.bo/inicio.aspx

这是我尝试使用CSS3重新创建那个渐变效果的结果 - 同时使用CSS3PIE：

#navigation {
    border: 1px solid #888888;
    border-radius: 22px;
    -moz-border-radius: 22px;
    -webkit-border-radius: 22px;    
    height: 50px;
    font-family: Arial;    
    background: #AAAAAA;
    background: -webkit-gradient(linear, 0 0, 0 bottom, from(#AAAAAA), to(#757575));
    background: -webkit-linear-gradient(#AAAAAA, #757575);
    background: -moz-linear-gradient(#AAAAAA, #757575);
    background: -ms-linear-gradient(#AAAAAA, #757575);
    background: -o-linear-gradient(#AAAAAA, #757575);
    background: linear-gradient(#AAAAAA, #757575);
    -pie-background: linear-gradient(#AAAAAA, #757575);
    behavior: url(/Public/stylesheets/PIE.htc);
}

这导致：

如何降低出血效应，使颜色过渡更加明显？

- Only Bolivian Here

---

http://jsbin.com/isozod/edit#javascript,html,live - Roko C. Buljan

为什么不将它作为答案提交？ - Only Bolivian Here

@roXon：那个jsbin链接可以使用，但是它会破坏PIE功能并且渐变边框半径不再出现。你有什么想法为什么它不起作用吗？ - Only Bolivian Here

Answer 1

在所需的背景颜色上面添加一个透明度为50%的白色渐变。此方法可用于任何背景颜色，而不需要更改渐变CSS。

演示：http://jsfiddle.net/ThinkingStiff/Zn5Qb/ CSS：

#header { 
    background-color: #595454;
    background-image: linear-gradient( 
            top, 
            rgba( 255, 255, 255, .4 ) 0%, 
            rgba( 255, 255, 255, .1 ) 50%,
            rgba( 255, 255, 255, .0 ) 50.5%, 
            rgba( 255, 255, 255, .0 ) 100% );
        background-image: -webkit-linear-gradient( 
            top, 
            rgba( 255, 255, 255, .4 ) 0%, 
            rgba( 255, 255, 255, .1 ) 50%,
            rgba( 255, 255, 255, .0 ) 50.5%, 
            rgba( 255, 255, 255, .0 ) 100% );
        background-image: -moz-linear-gradient( 
            top, 
            rgba( 255, 255, 255, .4 ) 0%, 
            rgba( 255, 255, 255, .1 ) 50%,
            rgba( 255, 255, 255, .0 ) 50.5%, 
            rgba( 255, 255, 255, .0 ) 100% );
        background-image: -o-linear-gradient( 
            top, 
            rgba( 255, 255, 255, .4 ) 0%, 
            rgba( 255, 255, 255, .1 ) 50%,
            rgba( 255, 255, 255, .0 ) 50.5%, 
            rgba( 255, 255, 255, .0 ) 100% );
        background-image: -ms-linear-gradient( 
            top, 
            rgba( 255, 255, 255, .4 ) 0%, 
            rgba( 255, 255, 255, .1 ) 50%,
            rgba( 255, 255, 255, .0 ) 50.5%, 
            rgba( 255, 255, 255, .0 ) 100% );
    height: 42px;
    width: 100%;
}

HTML:

<div id="header"></div>

输出:

- ThinkingStiff

Answer 2

应该可以工作。

#menu-bg {
  border: 1px solid #888888;
  border-radius: 22px;
  -moz-border-radius: 22px;
  -webkit-border-radius: 22px;    
  height: 50px;
  font-family: Arial; 
  background: #868686; /* Old browsers */
  background: -moz-linear-gradient(top,  #868686 0%, #727272 49%, #5e5e5e 51%, #747474 100%); /* FF3.6+ */
  background: -webkit-gradient(linear, left top, left bottom, color-stop(0%,#868686), color-stop(49%,#727272), color-stop(51%,#5e5e5e), color-stop(100%,#747474)); /* Chrome,Safari4+ */
  background: -webkit-linear-gradient(top,  #868686 0%,#727272 49%,#5e5e5e 51%,#747474 100%); /* Chrome10+,Safari5.1+ */
  background: -o-linear-gradient(top,  #868686 0%,#727272 49%,#5e5e5e 51%,#747474 100%); /* Opera 11.10+ */
  background: -ms-linear-gradient(top,  #868686 0%,#727272 49%,#5e5e5e 51%,#747474 100%); /* IE10+ */
  background: linear-gradient(top,  #868686 0%,#727272 49%,#5e5e5e 51%,#747474 100%); /* W3C */
  filter: progid:DXImageTransform.Microsoft.gradient( startColorstr='#868686', endColorstr='#747474',GradientType=0 ); /* IE6-9 */
}

    <div id="menu-bg"></div>

- NewUser