Switched to night mode and see what you mean. Those tables have been hard-coded to those background colours instead of using a table class (default is class=ffxi-table in the header, though there are other styles). All we can do is fix them manually as we come across them by adding the class and deleting the colour overrides.

Let me know which pages in particular are broken and I'll proritize those fixes. Dark mode compatibility has been an ongoing project and a lot of pages are still not quite there. Notably npc pages, job pages, and zone pages are quite hard to read and it's not a small fix.