AdminLte/build/scss/mixins/_sidebar-theme.scss

//
// Mixins: Sidebar Theme
//

@mixin sidebar-theme(
  $sidebar-bg,
  $sidebar-color
) {

  .wrapper {
    background: $sidebar-bg;
  }

  .main-sidebar {
    color: $sidebar-color;
    background-color: $sidebar-bg;
  }

  // Sidebar navigation menu
  .nav-sidebar {
    // All levels
    .nav-link {
      color: $sidebar-color;

      &:hover,
      .active {
        color: color-constract($sidebar-dark-color);
      }
    }
  }

  .sidebar-collapse:not(.layout-fixed) {
    .sidebar {
      .nav-sidebar .nav-item:hover {
        .nav-link:not(.active) {
          span {
            background-color: $sidebar-bg;
          }
        }
      }
    }
  }
}

//