This project is forked from ayu-vim; you can see its original README there.

This fork is for customizing the colors so that they look nicer and give higher contrast. Note that only the dark mode is affected by these changes.

ayu is still in development and a lot of things need to be covered. Theme works only if VIM supports termguicolors option. This is true for Neovim and VIM from 7.4.1799.

Plug 'SamMatzko/ayu-vim' " or other package manager
"...
set termguicolors     " enable true colors support
let ayucolor="light"  " for light version of theme
let ayucolor="mirage" " for mirage version of theme
let ayucolor="dark"   " for dark version of theme (modified theme)
colorscheme ayu