On Mon, Nov 19, 2018 at 10:57 AM Henning Hraban Ramm <texml@fiee.net> wrote:
 
It would make sense to outsource color calculations to a color management library like LittleCMS.

yes.
Perhaps this is still useful 
 https://www.tug.org/TUGboat/tb31-3/tb99scarso.pdf

--
luigi