@mixin alert-variant($background, $border, $color) {
color: color-yiq($background);
// @include gradient-bg($background);
background-color: lighten($background, 5%);
border-color: $border;
hr {
border-top-color: darken($border, 5%);
}
.alert-link {
color: darken($color, 10%);
}
}