title: Google Chart Setting Gridline Color
body: <p>I'm trying to set the color of the gridlines in the background of my Graph using Google Charts.</p>
  
  <p>I've got this code for setting the options of the chart:</p>
  
  <pre><code>ac.draw(activityData, {
      title : 'Monthly Coffee Production by Country',
      isStacked: true,
      width: 600,
      height: 400,
      fontSize: 0,
      backgroundColor: '#1E4D6B',
          hAxis.gridlines.color: '#1E4D6B'
  });
  </code></pre>
  
  <p>However, I don't know how to use the options like <code>hAxis.gridlines.color</code> within my code that appear in the <a href="https://developers.google.com/chart/interactive/docs/gallery/linechart#Configuration_Options" rel="noreferrer">configuration options page</a>.</p>
  
  <p>If I simply put <code>hAxis.gridlines.color</code>, it comes up with an error in the console of:</p>
  
  <blockquote>
    <p>Uncaught SyntaxError: Unexpected token .</p>
  </blockquote>
  
  <p>What is the correct syntax to make use of the options that contain periods?</p>