library(farver)
decode_colour("#4D6F8D", to = "Luv")
#> [,1] [,2] [,3]
#> [1,] 45.45406 -16.38278 -28.57429
decode_colour("#4D6F8D", to = "Lab")
#> [,1] [,2] [,3]
#> [1,] 45.45406 -3.682845 -20.23601
Created on 2020-10-30 by the reprex package (v0.3.0.9001)