Most of the Colored Contacts are made to mimic natural looks of the iris, the colored part of the eye. The iris is made of colorful shades and lines, the colored contacts as such mimic these tiny colors arranged in lines.
They are of three types:
Visibility tint is green or blue tint added to the lens to help the user see better during removal and insertion. The visibility tints are relatively faint and do not affect the natural eye colors.
Enhancement tint is solid and translucent tint that is a bit darker compared to visibility tint. Enhancement tint is meant to develop the natural eye color. They are the best for light-eyed people.
They are non-transparent tint that changes eyes completely. When having dark eyes, the lenses are made for you to change your eyes completely.