In case your eye color is of the darker variety then you should try and get yourself opaque colored lenses. Enhancement lenses are mostly for people with lighter eye colors and meant to affirm a particular color combination in the eyes. Try Freshlook Colorblends in True Sapphire. It is one of the most popular shades in blue contact lenses available in the market. There are of course other varieties like Durasoft 2 Colorblends which are good for already blue eyes as they give a darker tint to them. For darker eyes there is also Illusion in Deep Blue which works fine. Durasoft 2 Opaque Colors gives you a slightly violet shade in blue and is primarily for eyes of a lighter color.