cuba/modules/web/themes/havana/app/folders-pane.scss

@mixin cuba-folders-pane {
  .cuba-folders-pane {
    background: #fff url(images/folders-pane-bg.png) top repeat-x;

    .v-tree {
      border: 0;
      overflow: auto;

      .v-tree-node {
        .cuba-clickable-folder span {
          cursor: pointer;
        }

        .cuba-clickable-folder span:hover {
          text-decoration: underline;
          background: transparent none;
        }

        .cuba-nonclickable-folder span:hover {
          background: transparent none;
        }
      }
    }
  }

  .v-label.cuba-folders-pane-caption {
    font-size: 14px;
    color: #2B4766;
    background: url(images/folders-pane-header-bg.png) no-repeat 5px bottom;
    padding-top: 5px;
    padding-left: 5px;
  }
}