Package - ggsci
Novelty - No
Type - sequential
ggsci - grey_material
Use with paletteer package:
library(paletteer)
paletteer_d("ggsci::grey_material")
Use raw:
c("#FAFAFAFF", "#F5F5F5FF", "#EEEEEEFF", "#E0E0E0FF", "#BDBDBDFF", "#9E9E9EFF", "#757575FF", "#616161FF", "#424242FF", "#212121FF")