I would like to suggest the option to customize the dashboard (and the UI as a whole) to use a darker color scheme, with an extra optional feature to enable it based on set timeframes.
It would help ease eye strain when performing extended network monitoring after hours, and the option to set a timeframe for it to be enabled would allow operators to customize what times it should be active automatically without having to manually switch it each time.
For example, having a theme switch set to activate at 6PM local time would have the UI switch to a darker overall theme, and having the next switch at 6AM local would have it switch back to the default light theme. By timing it according to operator needs, it can reduce eye strain when observing the dashboard, in turn reducing mental fatigue and improving alertness when monitoring the network.
