No offence, but it's quite amazing how colours can end up being called something totally wrong!
There is no such definitive colour as British Racing Green, and no matter which end of the spectrum you come from, so many racing cars of many, many years ago when racing in international competitions where competing cars were painted in a colour to represent their country which in England's case was a green colour. Many of the competing teams such as Vanwall, Cooper, BRM & Lotus all used different shades of green and furthermore one thing is for certain, none of them were ever metallic green.
But back to the OP, a truly beautiful looking and immaculate TF, but my preference for the shade of green is always the dark metallic green as owned by BRG MG TF most especially when fitted with a cream leather interior.