Package - trekcolors
Novelty - Yes
Type - qualitative
trekcolors - red_alert
Use with paletteer package:
library(paletteer)
paletteer_d("trekcolors::red_alert")
Use raw:
c("#670000FF", "#990000FF", "#CD0000FF", "#FE0000FF", "#FF9190FF", "#4D4D4DFF")