Theres absolutely no need to apologise, Malcolm.
Your colour definition will go into the appropriate field in the Master!
I think colour is very much in the eye of the beholder
As Ive remarked elsewhere on the forum, web sites seem to be a bit shy in stating the colour. They show the image and leave it up to the individual!
Unfortunately theres a field in the database which needs a description, so I have to stick my neck out some times.
My father was colour blind, and Julian (my eldest son) is colour blind - he cant tell the difference between red and green.
I'm not, mercifully, and my wife is very good with colours.