
Moves the hue of a munsell colour in the direction purple->blue->green->yellow->red->purple
pbgyr(col, steps = 1)
character vector of Munsell colours
character vector of Munsell colours
number of hue steps to take
my_red <- "2.5R 4/8"
pbgyr(my_red)
plot_mnsl(c(my_red, pbgyr(my_red, 2), pbgyr(my_red, 4)))
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