Regarding rich maroon this seems to be the right color descritption as it was named also on this 1969 Plus 8. So you can see the same color in different light, but I'm not sure how much the different painting techniques will add to the impression, she weares probably not the water based 2K paints from nowadays.
http://www.rtcc.co.uk/used-morgan-proteus-carver/morgan-plus-8---moss-box-fia-papers
