complement: Find the complement of a munsell colour
Description
Finds the munsell colour with the same chroma and value but on the opposite
side of the hue circle. The complement is not defined
for greys (hue == "N"), and the function returns the grey untransformed.
Usage
complement(col, ...)
Arguments
col
character vector of Munsell colours
...
passed on to in_gamut. Use fix = TRUE to
fix "bad" complement