Averagely, colored contacts lenses are expensive than normal ones. Different producers may have different price, it depends on how much you what to cost. If you are going to buy colored lenses, then the most important thing is which color fits best for you. There are two types for colored contact lenses: lenses for light eyes and for dark eyes. If you want to be more attractive, you can try blue or green contact lenses.
Something you need to know is that colored contacts lenses may affect your vision, it's because the size of your pupil may change and your contacts lenses may also be moved for some reason, thus the colored section of the lenses may affect your vision.
One more thing, you need prescription for colored contacts lenses, so if you find a place where can offer you these contacts lenses, it may not safe and qualified.