After upgrading from 14.04 to 16.04, I have a number of issues with LibreOffice. See this screenshot:
Regarding the circled numbers on the screenshot:
Some interface elements, such as these tabs, the font color is nearly invisible.
The icons are difficult to see against the dark background. The default icons were much worse, but changing to Tango icons improved, but didn't fix, the problem.
The automatic font color is worse than before. See number 4.
Text using the automatic font color appears maroon. Previously, it was nearly black, which caused its own issues. This, though, is just ridiculous.
I'm using the default Ambiance theme. How can I fix these issues?
A bug report contains a solution for issue 1: Launch LibreOffice as follows, possibly via a wrapper script:
This does not solve the other issues I pointed out.