How to change the colour of the bottom bar on tmux?
Do C-b, :set window-status-bg cyan and the bottom bar should change colour. You can tell more easily by the titles and the colours as they’re actually set in your live session :show, than by searching through the man page, in my opinion.
What to do with the status bar in tmux?
The man page has very detailed descriptions of all of the various options (the status bar is highly configurable). Your best bet is to read through man tmux and pay particular attention to those options that begin with status-. So, for example, status-bg red would set the background colour of the bar.
How to change the color of the status bar?
Set status line message background colour, where colour is one of: black, red, green, yellow, blue, magenta, cyan, white, colour0 to colour255 from the 256-colour palette, or default. So, to list the available colors, first create a script, maybe colors.sh: Pick a color from the list, perhaps colour240, a shade of grey.
Is there a way to enable 256 color tmux?
The official method used to enable 256-color terminals by default is given on the Fedora Project Wiki. Follow that guide, or, as a per-user solution, create an alias for tmux to force 256-color support with the “-2” switch. Then start tmux to test it.
Do C-b, :show which will show you all your current settings. /green, nnn will find you which properties have been set to green, the default. Do C-b, :set window-status-bg cyan and the bottom bar should change colour.
Is there a new project for tmux powerline?
Update: This project is in a maintenance mode and no future functionality is likely to be added. tmux-powerline, with all other powerline projects, is replaced by the new unifying powerline. However this project is still functional and can serve as a lightweight alternative for non-python users.