title: PhpSpreadsheet set background color of cell to white
body: <p>Using PhpSpreadsheet, I want to set a white background to the excel cell.</p>
  <pre><code>$cells = 'A1';
  $spreadsheet
      -&gt;getActiveSheet()
      -&gt;getStyle($cells)
      -&gt;getFill()
      -&gt;setFillType(\PhpOffice\PhpSpreadsheet\Style\Fill::FILL_SOLID)
      -&gt;getStartColor(' #FFFFFF')
      -&gt;setARGB('#FFFFFF');
  </code></pre>
  <p>This code makes the cell background black even if I set this white RGB color value: <code>#FFFFFF</code>.</p>
  <p>The result I would like to achieve:</p>
  <p><a href="https://i.stack.imgur.com/GKBAP.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GKBAP.png" alt="BEFORE" /></a></p>
  <p><a href="https://i.stack.imgur.com/oP55e.png" rel="noreferrer"><img src="https://i.stack.imgur.com/oP55e.png" alt="AFTER" /></a></p>