Refresh terminal background color

[aorith]

So with OSC11 we can query the background color of the terminal:

❯ printf '\e]11;?\007'
^[]11;rgb:1818/1818/1818^G

Some terminals allow a live reload of their configuration, I'm using alacritty with an script to switch from a dark to a light theme.

The issue is that tmux doesn't refresh the terminal background color and the OSC11 sequence returns the old background color causing TUI apps to think that I'm still using a dark theme. If I close all tmux sessions and re-open tmux then it detects the new background.

Is there a way to tell tmux to query again the terminal background color?