Bug 46493

post sample code to reproduce the problem.
Also, see the Quick Guide:
http://poi.apache.org/spreadsheet/quick-guide.html#FillsAndFrills

Yegor

I don't know about version 3.2 but in 3.5 beta 4 the following code (with suitable code around it to create a workbook and save it etc) doesn't create a cell with a light blue background - the background is white. This functionality worked in 3.5 beta 3 (but setting the font as bold didn't work).

Font font = wb.createFont();
font.setBoldweight( Font.BOLDWEIGHT_BOLD );

CellStyle style = wb.createCellStyle();
style.setFillBackgroundColor( IndexedColors.LIGHT_BLUE.getIndex() );
style.setFont( font );

Cell cell = row.createCell( 0 );
cell.setCellStyle( style );
cell.setCellValue( "foo" );

You need to set the type of fill pattern.  The following snippet of code works fine to me:

        CellStyle style = wb.createCellStyle();
        style.setFillForegroundColor( IndexedColors.LIGHT_BLUE.getIndex() );
        style.setFillPattern(CellStyle.SOLID_FOREGROUND);
        style.setFont( font );

        Cell cell = row.createCell( 0 );
        cell.setCellStyle( style );
        cell.setCellValue( "foo" );

See the quick guide: http://poi.apache.org/spreadsheet/quick-guide.html

Yegor