在用作背景图像时修改SVG填充颜色
polygon.mystar { fill: blue;}circle.mycircle { fill: green;}
html { background-image: url(../img/bg.svg);}
<svg version="1.1" id="Layer_1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="320px" height="100px" viewBox="0 0 320 100" enable-background="new 0 0 320 100" xml:space="preserve"><polygon class="mystar" fill="#3CB54A" points="134.973,14.204 143.295,31.066 161.903,33.77 148.438,46.896 151.617,65.43 134.973,56.679 118.329,65.43 121.507,46.896 108.042,33.77 126.65,31.066 "/><circle class="mycircle" fill="#ED1F24" cx="202.028" cy="58.342" r="12.26"/></svg>
月关宝盒
神不在的星期二