demo/src/app/components/+alerts/demos/styling-global/styling-global.html
<style>
.alert-md-color {
background-color: #7B1FA2;
border-color: #4A148C;
color: #fff;
}
</style>
<alert type="md-color">
<strong>Well done!</strong> You successfully read this important alert message.
</alert>