guess there is a little bug in thsi contrib, bg-color doesnt work because of a mismatch between config and functions:

changed "PAGE_BG-COLOR" to "PDF_PAGE_BG_COLOR" in file pdf_datasheet_config.php to eleminate this mismatch, for example:
define('PDF_PAGE_BG_COLOR','230,230,230');

thats all to make it work ;-) ... looks that simple but made me spending hours and hours trying and testing ^^

More...