mui-badge-warning/mui-badge-yellow

Mui.css （v3.0.0）部分源码：

1804
.mui-badge-warning, .mui-badge-yellow
{
    color: #fff;
    background-color: #f0ad4e;
}
.mui-badge-warning.mui-badge-inverted, .mui-badge-yellow.mui-badge-inverted
{
    color: #f0ad4e;
    background-color: transparent;
}