tools/side_chain_tool/web/node_modules/bootstrap/scss/mixins/_badge.scss

   1 @mixin badge-variant($bg) {
   2   color: color-yiq($bg);
   3   background-color: $bg;
   4
   5   &[href] {
   6     @include hover-focus {
   7       color: color-yiq($bg);
   8       text-decoration: none;
   9       background-color: darken($bg, 10%);
  10     }
  11   }
  12 }