embedded_libs/fmt-8.1.1/doc/bootstrap/mixins/background-variant.less
browsing at commit = 6605e011752a7619a8985b75cdaa4eccd6bc79c2
// Contextual backgrounds
.bg-variant(@color) {
background-color: @color;
a&:hover {
background-color: darken(@color, 10%);
}
}