tpl product info does not have any thing for back ground color

" <!--bof Product description -->
<?php if ($products_description != '') { ?>
<div id="productDescription" class="productGeneral biggerText"><?php echo stripslashes($products_description); ?></div>

<?php } ?>
<!--eof Product description -->"

When I add #productDescription {background:#013991;} to stylesheet background color of description content/font stays white but the space between two line/paragraphs get background of #productDescription {background:#013991;}. How I can get full description content background to #productDescription {background:#013991;}.

For example see attached.
Thank you!