How do I change the theme?

How do I change the theme?

[fisadev]

Hey! Sorry for the delay. Just in case anyone else reaches this issue:

You can just modify this block:

" use 256 colors when possible
if has('gui_running') || using_neovim || (&term =~? 'mlterm\|xterm\|xterm-256\|screen-256')
    if !has('gui_running')
        let &t_Co = 256
    endif
    colorscheme vim-monokai-tasty
else
    colorscheme delek
endif

This if basically chooses vim-monokay-tasty when running in GUI or a terminal with enough colors, or delek in more primitive environments. You can just remove the whole block, and leave something like:

colorscheme my-favorite-super-fancy-theme