Make your plots with the official colours used by the IUCN according to their style guide.
I saw this tweet on a Friday night and wanted to dive right in:
Hey data science instructors! Are you looking for data that’s rich + real + realistic while still being accessible to novices? Then check out the latest update to the #fivethirtyeight #rstats package! 1/4 pic.twitter.com/XMaeZK2kOj— Albert Y. Kim (@rudeboybert) August 2, 2019