Package - ggsci
Novelty - No
Type - sequential

ggsci - indigo_material

Github

nanxstats/ggsci

CRAN

ggsci

Use with paletteer package:

library(paletteer)
paletteer_d("ggsci::indigo_material")

Use raw:

c("#E8EAF6FF", "#C5CAE9FF", "#9FA8DAFF", "#7986CBFF", "#5C6BC0FF", "#3F51B5FF", "#3949ABFF", "#303F9FFF", "#283593FF", "#1A237EFF")