Create HCL data frame for surface
data_surface_hl(sfc, step = 0.5)function created using surface_hl().
numeric, step size in hue, luminance
tibble with columns h, c, l, hex.
  # multi hue
  sfc_blues_multi <- surface_hl(c(240, 260))
  df_sfc <- data_surface_hl(sfc_blues_multi) # lots of rows!