It's called Chestnut Red-Metallic
It's the same color I had on my 1984 gtv6...bought in Miami...beautiful color, very rare, and very different. The photos don't do it justice. The color is very deep, with multiple layers of clear coat, and if you stand right up to it, you feel as if you are falling into the rabbit hole. I kept an MG Mitten cover on it, and eventually the cover/heat caused the paint on the sun roof to discolor...other than that the color held up beautifully both in the South Florida sun, and later in the cold and snow of Maine...sold the car in December 1987...wonder what happened to it.