Package - khroma
Novelty - No
Type - qualitative

khroma - mediumcontrast

Github

tesselle/khroma

CRAN

khroma

Use with paletteer package:

library(paletteer)
paletteer_d("khroma::mediumcontrast")

Use raw:

c("#EECC66FF", "#EE99AAFF", "#6699CCFF", "#997700FF", "#994455FF", "#004488FF")