Copy files from colorscheme folder to .vim/colors/ or ~/.config/nvim/colors, then copy the corresponding files to your vim-airline-themes folder (e.g. .config/nvim/plugged/vim-airline-themes/autoload/airline/themes/), and add these lines to your .vimrc (or init.vim):
For Cyberpunk theme:
set termguicolors
colorscheme cyberpunk
let g:airline_theme='cyberpunk'For Silverhand theme, change cyberpunk in the above lines to silverhand.
Inspired by https://github.com/aloussase/cyberpunk