Grubber is a theme for Rstudio, in .rstheme format. It looks like this:
Download the .rstheme file and install it following the instructions here, or alternatively, do this:
# temp download folder
grubber <- fs::path_temp("grubber", ext = "rstheme")
# get theme
download.file("https://raw.githubusercontent.com/RobertMyles/grubber/master/Grubber.rstheme",
grubber)
# apply theme
rstudioapi::addTheme(grubber, apply = TRUE)