I liked the 'Splash Green' of the NB8B model because it was 'out there'.

Yellow and Orange are great sports car colours. Maybe even lime green (if it's a Lambo) Remember that fantastic light metallic green that Jaguar had?
I liked the subtle light spearmint green of the NB8C, particularly with the navy hood. Here's a pic.

If it has to be silver-grey, then the NB8C also had the best 'Titanium' I have seen.
"Subdued' and 'conservative' are for family sedans.