What is the best lipstick color,for going out at night?

That depends on your skin and hair color
A little more specific...

You should choose lipsticks that suits your skin tone. Wear a lighter shade of lipstick during the day and a darker shade when you go out at night.

My favourite shade of lipstick to wear at night is the shade Mac's rossetto rizzo. I found it on this site - East End Cosmetics (http://www.eastendcosmetics.co.uk/)