.koso-plavo {
  background-color: #f5b73d;
  background-image: -webkit-gradient( linear,to bottom right, color-stop( 51%, #f5b73d ), color-stop( 51%, #f5b73d ), color-stop( 49%, #4692eb ) );
  background-image: -webkit-linear-gradient( top, #f5b73d 50%, #f5b73d 51%, #4692eb 49% );
  background-image: -moz-linear-gradient( top, #ff0 50%, #f5b73d 51%, #4692eb 49% );
  background-image: linear-gradient(to bottom right, #4692eb 49%, rgb(245,183,61) 51%);
  height: 50px;
}