mui-btn-royal/mui-btn-purple

Mui.css （v3.0.0）部分源码：

1291
.mui-btn-royal, .mui-btn-purple
{
    color: #fff;
    border: 1px solid #8a6de9;
    background-color: #8a6de9;
}
.mui-btn-royal:enabled:active, .mui-btn-royal.mui-active:enabled, .mui-btn-purple:enabled:active, .mui-btn-purple.mui-active:enabled
{
    color: #fff;
    border: 1px solid #6641e2;
    background-color: #6641e2;
}