I need to document this as a reminder for myself and as a saviour blog post to any person out there in the internet that uses Vim and Tmux.
Read the following blog post. That is all I'm going to say.
Solved a problem I've had for years in Vim. Thank you random internet person.
Hopefully this helps you as well, random internet person.
Thought I should probably post the solution as well:
if &term =~ '256color' " disable Background Color Erase (BCE) so that color schemes " render properly when inside 256-color tmux and GNU screen. " see also http://sunaku.github.io/vim-256color-bce.html set t_ut= endif"