Thanks for all your feedback, whether via the blog or verbally. I have mulled over your suggestions and have reached a conclusion.
My favoured colours for the stripes are currently gun metal metallic grey main stripes, with red 'pin stripes' down each side.
However, I am going to leave the car white, as it is, for the time being. I can always change my mind and add some stripes at a later date and if I get it wrong it won't be the end of the world as I can remove them or change them (they would be applied by a car wrapping company). In fact changing the stripes would refresh the car and give it a new look!
So what you see, is what it will be colour wise.