Package - trekcolors
Novelty - Yes
Type - sequential

trekcolors - ufp

Github

leonawicz/trekcolors

CRAN

trekcolors

Use with paletteer package:

library(paletteer)
paletteer_d("trekcolors::ufp")

Use raw:

c("#E4E4E4FF", "#CBCBD6FF", "#B3B2C9FF", "#9A9ABCFF", "#8281AFFF", "#6968A2FF", "#515095FF", "#383788FF", "#201F7BFF")