gitlabhq/app/assets/stylesheets/themes/ui_basic.scss

/**
 * This file represent some UI that can be changed
 * during web app restyle or theme select.
 *
 */
.ui_basic {
  /*
   * Common styles
   *
   */
  a {
    color: $link_color;
    &:hover {
      text-decoration:none;
      color: $blue_link;
    }
  }

  header { 
    .fbtn {
      .btn {
        background-color: #F8F8F8;
        background-image: -webkit-gradient(linear,left top,left bottom,from(#F8F8F8),to(#ECECEC));
        background-image: -webkit-linear-gradient(top,#F8F8F8,#ECECEC);
        background-image: -moz-linear-gradient(top,#F8F8F8,#ECECEC);
        background-image: -ms-linear-gradient(top,#F8F8F8,#ECECEC);
        background-image: -o-linear-gradient(top,#F8F8F8,#ECECEC);
        background-image: linear-gradient(top,#F8F8F8,#ECECEC);
        filter: progid:DXImageTransform.Microsoft.gradient(startColorStr='#f8f8f8',EndColorStr='#ececec');
        border-color: #C6C6C6;
        margin-left:7px;
        @include border-radius(3px);
        box-shadow:none;
        color:#666;
      }
    }
    .search {
      .search-input {
        @include border-radius(3px);
        border-color: #C6C6C6;
        box-shadow:none;
      }
    }
    .pic { 
      img { 
        @include border-radius(3px);
      }
    }
  }
}