mui-btn-warning/mui-btn-yellow

Mui.css （v3.0.0）部分源码：

1265
.mui-btn-warning, .mui-btn-yellow
{
    color: #fff;
    border: 1px solid #f0ad4e;
    background-color: #f0ad4e;
}
.mui-btn-warning:enabled:active, .mui-btn-warning.mui-active:enabled, .mui-btn-yellow:enabled:active, .mui-btn-yellow.mui-active:enabled
{
    color: #fff;
    border: 1px solid #ec971f;
    background-color: #ec971f;
}