Good Evening,
I have a British South Africa Company Rhodesia stamp from 1910 which is 6d and I believe to be almost mauve on mauve. I have been using my color selector and according to my color wheel some parts within the portraits match the frame. The darkest mauve is on the outside frame and I have been selecting those and other colors from the frame for comparison.
I'm looking for further analysis and what program is best for stamp color analysis if you could please.

Thanks for looking