我建議使用:http://colorzilla.com/gradient-editor/在這種情況下...
我一般建議所有的在線工具...:P
正如你所看到的,這是非常有用的:
background: #ffff00; /* Old browsers */
/* IE9 SVG, needs conditional override of 'filter' to 'none' */
background: url(data:image/svg+xml;base64,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);
background: -moz-radial-gradient(center, ellipse cover, #ffff00 0%, #0000ff 100%); /* FF3.6+ */
background: -webkit-gradient(radial, center center, 0px, center center, 100%, color-stop(0%,#ffff00), color-stop(100%,#0000ff)); /* Chrome,Safari4+ */
background: -webkit-radial-gradient(center, ellipse cover, #ffff00 0%,#0000ff 100%); /* Chrome10+,Safari5.1+ */
background: -o-radial-gradient(center, ellipse cover, #ffff00 0%,#0000ff 100%); /* Opera 12+ */
background: -ms-radial-gradient(center, ellipse cover, #ffff00 0%,#0000ff 100%); /* IE10+ */
background: radial-gradient(ellipse at center, #ffff00 0%,#0000ff 100%); /* W3C */
filter: progid:DXImageTransform.Microsoft.gradient(startColorstr='#ffff00', endColorstr='#0000ff',GradientType=1); /* IE6-8 fallback on horizontal gradient */
JSFiddle:http://jsfiddle.net/gVetP/6/