Color palettes inspired by plots in Lancet journals, such as Lancet Oncology.
pal_lancet(palette = c("lanonc"), alpha = 1)Palette type.
Currently there is one available option: "lanonc"
(9-color palette inspired by Lancet Oncology).
Transparency level, a real number in (0, 1].
See alpha in grDevices::rgb() for details.