Convert Pantone PMS codes to Munsell notation
PMS2Munsell(codes)vector of PMS codes (e.g. '7630-c'), may contain NA, see pms.munsell.lut
data.frame containing closest associated Munsell color (via rgb2munsell), hex notation, and perceptual color distance (dE00) between sRGB values and closest Munsell "chip".
Conversion of Pantone spot colors (PMS code) is performed by look-up from pms.munsell.lut. Association is based on the "closest" Munsell color via CIE2000 distance metric (dE00) (see rgb2munsell). This is an experimental association between the two color systems and should not be used for precision color matching or paint mixing applications.
Possible uses include rough estimation of soil colors in the field, by means of color swatches based on the Pantone system. This type of color matching is most appropriate in an educational setting where official soil color books may be too expensive.
Inspired by the work and outreach efforts of Dr. Karen Vaughan (UWY).
# safely handles NA
codes <- c(NA, "7630-c", "102-c")
PMS2Munsell(codes)
#> code hex munsell dE00
#> 1 <NA> <NA> <NA> NA
#> 2 7630-c #633231 7.5R 2.5/5 1.6480725
#> 3 102-c #fce300 5Y 9/13 0.5232638