How to use custom theme in Vim

There are numerous methods for installing a custom theme in your VIM setup, but the easiest I've found is through VimPlug. Here are the steps I followed to accomplish this:

1. Install vim-plug

This can be easily done by executing the following command:

curl -fLo ~/.vim/autoload/plug.vim --create-dirs \
    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

2. Next, add vim-plug to your vim configuration, which is located in the ~/.vimrc file (don't worry if it's empty).

You can copy and paste the following configuration file, replacing olivercederborg/poimandres with the theme of your choice:

call plug#begin()
 
Plug 'olivercederborg/poimandres.nvim'
 
call plug#end()

3. Reload your terminal.

4. Open vim, press esc, and type :PlugInstall. Now you're all set