background-image使用svg如何改变颜色

i {
    display: inline-block;
    width: 100px;
    height: 100px;
}
.icon-del{
    background-image: url(delete.svg);
}
.st0{fill:#EC665E;}
.st1{fill:#FFFFFF;}

<i class="icon-del"></i>

<?xml version="1.0" encoding="utf-8"?>
<!-- Generator: Adobe Illustrator 19.0.0, SVG Export Plug-In . SVG Version: 6.00 Build 0)  -->
<svg version="1.1" id="图层_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px"
      viewBox="-691 693 16 16" style="enable-background:new -691 693 16 16;" xml:space="preserve">
<title>删除群成员</title>
<desc>Created with Sketch.</desc>
<g id="Page-1">
     <g id="群组名片成员_x28_管理员_x29_" transform="translate(-284.000000, -249.000000)">
          <g id="Group-19">
               <g id="Group-14" transform="translate(20.000000, 120.000000)">
                    <g id="群成员-copy-4" transform="translate(0.000000, 121.000000)">
                         <g id="删除群成员" transform="translate(264.000000, 8.000000)">
                              <g id="Group" transform="translate(2.000000, 2.000000)">
                                   <g id="Oval-9">
                                        <circle class="st0" cx="-685" cy="699" r="6"/>
                                   </g>
                                   <g id="Path-2">
                                        <path class="st1" d="M-681,700h-8c-0.6,0-1-0.4-1-1s0.4-1,1-1h8c0.6,0,1,0.4,1,1S-680.4,700-681,700z"/>
                                   </g>
                              </g>
                         </g>
                    </g>
               </g>
          </g>
     </g>
</g>
</svg>