谷歌图表Api:为单个条形图设置ColumnChart条形图颜色

<script type="text/javascript" src="https://www.gstatic.com/charts/loader.js"></script>

<div id="chart_div"></div>

google.charts.load('current', { 'packages': ['corechart'] });
google.charts.setOnLoadCallback(drawChart);

function drawChart() {
  var data = google.visualization.arrayToDataTable([
    ['Year', 'Sales'],
    ['2018', 1000],
    ['2019', 1500],
    ['2020', 2000]
  ]);

  var options = {
    colors: ['#3366cc'], // 设置条形图的颜色
    chartArea: { width: '50%' },
    hAxis: { title: 'Year' },
    vAxis: { title: 'Sales' }
  };

  var chart = new google.visualization.ColumnChart(document.getElementById('chart_div'));
  chart.draw(data, options);
}