The LibreOffice has this weird dark to white gradient in the toolbar. I don't have any custom LO theme (maybe an icon theme). I do have a dark Plasma theme, but none of the KDE apps have any gradient issues. (I'm not really sure if LO is a Qt or GTK). I've tried searching through LO options, messing around with colour settings, but couldn't find anything that would help.
I'm not sure if it's related, but those cell headers have this light highlight that's also distracting, but I also couldn't find anywhere to change that.
$ pacman -Qi libreoffice-fresh | grep Version Version : 5.1.3-1