The palette based proposed by Okabe and Ito (2008).
palette_okabeito(palette = "full_amber", reverse = FALSE, order = 1:9, ...)palette_oi(palette = "full_amber", reverse = FALSE, order = 1:9, ...)
Character name of palette. Depending on the color scale, can
be "full", "ice", "rainbow", "complement",
"contrast", "light" (for dark themes), "black_first", full_original,
or black_first_original.
Boolean indicating whether the palette should be reversed.
A vector of numbers from 1 to 9 indicating the order of colors to use
(default: 1:9)
Additional arguments to pass to colorRampPalette().
This function is usually not called directly, but from within
scale_color_material().
Okabe, M., & Ito, K. (2008). Color universal design (CUD): How to make figures and presentations that are friendly to colorblind people. https://jfly.uni-koeln.de/color/#pallet (Original work published 2002)