Package - unikn
Novelty - Yes
Type - sequential

unikn - pal_petrol

Github

hneth/unikn

CRAN

unikn

Use with paletteer package:

library(paletteer)
paletteer_d("unikn::pal_petrol")

Use raw:

c("#9CC6CFFF", "#6AAAB7FF", "#398D9FFF", "#077187FF", "#035F72FF")