Access colorio whitepoints
whitepoints_cie1931(name)
character
a legal name of a whitepoint:
"A"
, "C"
, "D50"
, "D55"
, "D65"
, "D75"
numeric
array
with one dimension of length 3.
# not run because it requires Python
if (FALSE) {
whitepoints_cie1931("D65")
}