Package - ggprism
Novelty - Yes
Type - qualitative
ggprism - shades_of_gray
Use with paletteer package:
library(paletteer)
paletteer_d("ggprism::shades_of_gray")
Use raw:
c("#000000FF", "#A0A0A4FF", "#808080FF", "#A0A0A4FF", "#606060FF", "#A0A0A4FF", "#606060FF", "#A0A0A4FF", "#A0A0A4FF")