text: 
  Highcharts.chart('container', {
  
      title: {
          text: 'Monthly temperatures in a random cold place'
      },
      subtitle: {
          text: 'All series should be blue below zero'
      },
      xAxis: {
          type: 'datetime'
      },
      plotOptions: {
          series: {
              className: 'main-color',
              negativeColor: true
          }
      },
      series: [{
          name: 'Spline',
          type: 'spline',
          data: [-6.4, -5.2, -3.0, 0.2, 2.3, 5.5, 8.4, 8.3, 5.1, 0.9, -1.1, -4.0],
          pointStart: Date.UTC(2010, 0),
          pointInterval: 31 * 24 * 36e5
      }, {
          name: 'Area',
          type: 'area',
          data: [-6.4, -5.2, -3.0, 0.2, 2.3, 5.5, 8.4, 8.3, 5.1, 0.9, -1.1, -4.0],
          pointStart: Date.UTC(2011, 0),
          pointInterval: 30 * 24 * 36e5
      }, {
          name: 'Column',
          type: 'column',
          data: [-6.4, -5.2, -3.0, 0.2, 2.3, 5.5, 8.4, 8.3, 5.1, 0.9, -1.1, -4.0],
          pointStart: Date.UTC(2012, 0),
          pointInterval: 30 * 24 * 36e5
      }]
  });