title: How to apply background color to the Excel cell in OpenTBS?
body: <p>I cannot figure out how to apply background color to the cell in OpenTBS. </p>
  
  <p>I've tried Word's syntax but it did not work.</p>
  
  <pre><code>[row.cell.val][row.cell.bg;att=w:shd#w:fill]
  </code></pre>
  
  <p>Code in PHP (simplified)</p>
  
  <pre><code>$rs = [
      // ... 
      'cell' =&gt; [
          'val' =&gt; 5,
          'bg'  =&gt; 'efefef',
      ],
  // ...
  ];
  
  $TBS-&gt;MergeBlock('row', $rs);
  </code></pre>
  
  <p>I looked inside XML body of excel document, but could not understand what tags and attributes define the color of the cell.</p>
  
  <p>Can anyone help me?</p>