When dressing up for Halloween, many people feel their costume is not complete without contacts. If you are one of these people, the fact that every accessory has to match is a large part of your look. Choosing Halloween Contact Lenses for effect to bring out makeup or to finish the costume can be difficult if you can’t decide which type of lens to use. If you are dressing up as a vampire, black sclera contacts as seen in 30 Days of Night are number one on popularity lists. For demons, red contacts are a favorite, and as a witch, green contacts rank in the top 3.