GNU Emacs / N Λ N O is a set of configuration files for GNU Emacs such as to provide a nice and consistent look and feel. It is based on design principles Nicolas P. Rougier described in the article *On the design of text Editors* that is available on arXiv. The light theme is based on Material colors and the dark theme is based on Nord colors. github 
Emacs is the coolest Text Editor on the planet.