- rgb->xyz cprocedure
- xyz->rgb cprocedure
- xyz->l*ab cprocedure
- l*ab->xyz cprocedure
- rgb->l*ab cprocedure
- l*ab->rgb cprocedure
Convert to l*ab. Colors are vectors of values. This is space in which Euclidean distance is similar to human perceputal distance. These implement a 2 degree observer and the D65 illuminant.