LibreOffice get colors back in PDF exports
Since OpenOffice  moved to LibreOffice , direct consequence of Sun Microsystems bought by Oracle , some differences may have been felt, except name change.OpenOffice.org - the Free and Open Productivity Suite
LibreOffice, free and open source productivity suite
Oracle and Sun
One of them, on my LibreOffice version (actually 3.3.3), had a particular impact on me : my PDF exports were systematically black and white.
For example, while working on a LibreOffice Writer document (Fig 1), containing some colored titles, I noticed that PDF export, with same options (Fig 2) as before version change, was exported as a black and white PDF (Fig 3).
A simple solution that I propose you, is to look in your print options (Ctrl + P). Once in the print screen, go in the LibreOffice Writer tab, and uncheck "Print text in black" option (Fig 4). Cancel is enough, it is not necessary to start printing.
Re-export then your file in PDF, and colors are back (Fig 5)!
On my computer, this manipulation have to be done each time I start LibreOffice , as this option is automatically checked, even if I change it.