When you take your camera out at night the colours really pop. I look for colour in my images and perfect lighting not the subject. There is more to creating an interesting image then simply Xerox-ing your environment.
Human eyes are far less sensitive to colour at night then in daylight. Strange but true. Digital cameras and film retain the same sensitivity regardless of the time when the image is shot. Therefore photos made at night have much vivid colours than what we see under the same conditions. This makes it easy to get wild colours.
Photograph before the sky turns completely dark, typically a half hour after sunset, to get a sky instead of a black hole. Skies at night turn funny colours from whatever street lights are miles away. Make your shots while there is still light in the sky for better results.
Photograph any neon or artificial lighting. Artificial lighting, either as an object in your photo or as a source of illumination, adds wild colours. Every kind of light, mercury, sodium, fluorescent, tungsten, renders as a different weird colour in photographs. I use this to my advantage.
