Samsung CLX 3180 doesn't print colors

I recently got my hands on an old Samsung CLX 3180 laser printer. It seems to work quite well with the "Generic PCL Laser Printer" driver. Unfortunately, though, it doesn't print in color. I've tried to use the "system-config-printer" tool but there I only see the advanced option "print-color-mode: monochrome" as depicted below: There is no color option. Using the official ULD HP drivers or general HP drivers doesn't help either. These drivers don't result in a working configuration and I can't even print a test page using those. Any help or ideas are highly appreciated.