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

/**
 * This file represent some UI that can be changed 
 * during web app restyle or theme select. 
 * 
 * Next items should be placed there
 * - link colors
 * - header styles
 * - main menu styles
 *
 */
.ui_modern { 
  ul.main_menu { 
    background:none;
    box-shadow:none;
    @include border-radius(0px);
    border:none;
    border-bottom:2px solid #456;

    li { 
      border:none;

      &.current {
        border-bottom:2px solid #f90;
        background-color:#fff;
        position:relative;
        top:2px;
      }
    }
  }

  /*
   * Common styles
   *
   */
  a {
    color: #E28934;
    &:hover { 
      text-decoration:none; 
      color: #f90;
    }
  }

  .btn { 
    &.primary, 
    &.btn-primary { 
      border-color:#C60;
      background:#D70;

      &:hover { 
        background:#F90;
      }
    }
  }

  .alert-info { 
    border-color:#FDA;
    background:#FED;
    color:#D70;
  }
  

  .progress .bar { 
    background:#D80;
  }

  .back_link { 
    color:#D80;
  }
}