Themes won't work when using Tmux in terminal

[ariajafari]

environment

• vim: 8.2.1119
  

• vim-airline: 0.11

• colorscheme: no colorscheme

• OS: Linux debian 4.19.0-9-amd64 screenshots #1 SMP Debian 4.19.118-2+deb10u1 (2020-06-07) x86_64 GNU/Linux

• Have you reproduced with a minimal vimrc: ?yes

• What is your airline configuration: let g:airline_powerline_fonts = 1
  let g:airline_theme='powerlineish'

if you are using terminal:

• terminal: GNOME Terminal
• $TERM variable: xterm-256color
• color configuration (:set t_Co?):
  if you are using Neovim:
• does it happen in Vim: ???

actual behavior

Themes won't work when using Tmux in terminal

expected behavior

Themes should work weather Tmux is running or not

screen shot (if possible)

[chrisbra]

color configuration (:set t_Co?):

So what about that?

[ariajafari]

color configuration (:set t_Co?):

So what about that?

t_Co=256

[chrisbra]

does it work with any other theme? What about the graphical version (gvim)? Does (un-)setting termguicolors make any difference?

[ariajafari]

I have tried most of the themes and all of them had the problem. Setting or unsetting the termguicolors makes no difference. I don't have gvim installed.
When I exit Tmux all of themes work correctly.

[get-me-power]

Remove set termguicolors and add the following configuration to ~/.tmux.conf I think adding it would fix the problem.

tmux.conf

set-option -g default-terminal screen-256color
set -g terminal-overrides 'xterm:colors=256'

I don't think this is a vim-airline issue.
If the tmux settings go right, it should work fine.

[ariajafari]

I made the file .tmux.conf in my home directory and pasted those two lines in the file. But the problem still persists.

[get-me-power]

It does not reappear.
Please reload the tmux and try.

[ariajafari]

As you mentioned it was tmux's problem. I reinstalled tmux and the problem solved. Thanks a lot.