Package - RColorBrewer
Novelty - No
Type - sequential

RColorBrewer - Greys

Github

Not on Github

CRAN

RColorBrewer

Use with paletteer package:

library(paletteer)
paletteer_d("RColorBrewer::Greys")

Use raw:

c("#FFFFFFFF", "#F0F0F0FF", "#D9D9D9FF", "#BDBDBDFF", "#969696FF", "#737373FF", "#525252FF", "#252525FF", "#000000FF")