vue-material/src/components/mdButtonToggle/mdButtonToggle.scss

@import '../../core/stylesheets/variables.scss';

.md-button-toggle {
  .md-button:not([disabled]) {
    color: rgba(#000, .54);

    &:hover:not(.md-toggle) {
      &:not(.md-raised) {
        background-color: rgba(#999, .2);
        text-decoration: none;
      }
    }
  }
}