Absolutely love the product and the introduction of the Darkmode feature. But is there a way one could adjust the color of the expansion arrow? It's extremely hard to see due to the color of grey being used over the dark background
I assume you mean the arrow-right/arrow-down characters on the left in the server view?
This has already been addressed with proxmox-widget-toolkit 3.6.4, see also the bug report.
Depending on your repository setup, you should soon see the update.