title: NPOI setting background color isn't working
body: <p>I need to set and remove the background color of rows. Somewhy when I set style to the row it isn't working - there is still no background color of the row. I've tried to set the CellStyle property of the single cell and use the HSSFStyle. The result is the same - no background color. Here's the code:</p>
  
  <pre><code>        XSSFCellStyle style = (XSSFCellStyle)_myBook.CreateCellStyle();
          // Define cell style according to input color parameter
          XSSFColor colorToFill;
          switch (color)
          {
              default:
                  colorToFill = new XSSFColor(Color.Gray);
                  break;
          }
          style.SetFillBackgroundColor(colorToFill);
          for (int i = From; i &lt;= To; i++)
          {
              var row = GetCreateRow(i);
              row.RowStyle = style;
          }
  </code></pre>
  
  <p>P.S. Document is opened in XSSF format</p>