Don't you mean Cooper stripes if they are going on a mini? Some cars can carry off stripes (the original mini being one) and some can't...So depends on the car and also the base colour as well for some reason.
I think they look good on a sporty car like a viper but naff on an ordinary car like the chrystler Neon. If you mini looks sporty then I reckon it would be cool.
It's black and I was thinking silver stripes along the whole length of the car. There's 3 other cars exactly the same in my area so I have to do something to stand out!