Color palettes inspired by plots in journals published by American Association for the Advancement of Science (AAAS), such as Science and Science Translational Medicine.
pal_aaas(palette = c("default"), alpha = 1)
Currently there is one available option:
Transparency level, a real number in (0, 1].
show_col(pal_aaas("default", alpha = 0.6)(10))