title: Change font color of labels and title of a 3D bar chart drawn using amcharts
body: <p>I have drawn a 3D stacked bar chart as follows. </p>
  
  <pre><code>$scope.DrawFunction = function()
  {
  am4core.useTheme(am4themes_animated);
  // Themes end
  
  // Create chart instance
  var chart = am4core.create("chartdiv", am4charts.XYChart3D);
  
  // Add data
  chart.data = [{
      "country": "USA",
      "year2017": 3.5,
      "year2018": 4.2
  }, {
      "country": "UK",
      "year2017": 1.7,
      "year2018": 3.1
  }];
  
  // Create axes
  var categoryAxis = chart.xAxes.push(new am4charts.CategoryAxis());
  categoryAxis.dataFields.category = "country";
  categoryAxis.renderer.grid.template.location = 0;
  categoryAxis.renderer.minGridDistance = 30;
  
  var valueAxis = chart.yAxes.push(new am4charts.ValueAxis());
  valueAxis.title.text = "GDP growth rate";
  valueAxis.renderer.labels.template.adapter.add("text", function(text) {
    return text + "%";
  });
  
  // Create series
  var series = chart.series.push(new am4charts.ColumnSeries3D());
  series.dataFields.valueY = "year2017";
  series.dataFields.categoryX = "country";
  series.name = "Year 2017";
  series.clustered = false;
  series.columns.template.tooltipText = "[white]GDP grow in {category} (2017): [bold]{valueY}[/]";
  series.columns.template.fillOpacity = 0.9;
  
  var series2 = chart.series.push(new am4charts.ColumnSeries3D());
  series2.dataFields.valueY = "year2018";
  series2.dataFields.categoryX = "country";
  series2.name = "Year 2018";
  series2.clustered = false;
  series2.columns.template.tooltipText = "GDP grow in {category} (2017): [bold]{valueY}[/]";
  }
  </code></pre>
  
  <p>graph is generated correctly. I want to change the font color of all labels and the title into another color. I managed to change the font color of tootltip letters but couldn't find a way to change the font color of others.How can I do that ?</p>