This is an adaptation of Adrian Cs very nice Zenburn theme for Awesome WM, which should align to the Nord color palette.
The theme goes very well with the Arc GTK theme.
Clone the repo into your themes directory (usually /usr/share/awesome/themes) and rename it to "nord".
cd /usr/share/awesome/themes
git clone https://github.com/hmix/awesome-wm-nord-theme.git nord
After that, activate your theme in your configuration file.
beautiful.init(gears.filesystem.get_themes_dir() .. "nord/theme.lua")