wezterm > tmux > nvim colors not forwarded through tmux correctly

I'm currently having the problem that the colors are not forwarded correctly from nvim through tmux to wezterm. I think tmux is to blame since the colors work like expected when I invoke nvim from wezterm directly. Compare this: * This is wezterm -> tmux -> nvim: * And these are the colors when I invoke wezterm -> nvim directly: Here the colors are displayed correctly. I read on reddit about users having a similar problem, however the solution doesn't work for me. Briefly, the solution suggests adding those two attributes to the .tmux.conf file: * .tmux.conf

# Fix Colors
    set -g default-terminal "screen-256color"
    set -as terminal-features ",xterm-256color:RGB"

But when I do that nothing changes. Strangely, also tmux doesn't seem to detect wezterm correctly, I needed to add export TERM=xterm to my .bashrc (I believe TERM should be set by all terminal emulators to inform subshells about their capabilities?). Maybe the issue is related to this. OS is Ubuntu 20.04/GNOME