I develop software that enhances Neovim facilities to edit R code. Nvim-R is a Neovim plugin to control R. It requires that R has the package nvimcom is loaded. The package colorout colorizes R output. The five slides below show R running in a Neovim terminal buffer (they are explained at the README file of Nvim-R source code).
The Vim color scheme used above is Southernlights.