solotica is the most natural looking contacts I have ever seen .but it is much expensive and difficult to get in USA . For other brand ,I would recommend Freshlook .they can offer free trial and you can have a try .
The traditional contact lenses will make you see things clearly, with no color. However, the colored contact lenses have additional function of being an accessory besides the vision function. The brown contact lenses will make your eyeballs look brown naturally, with no make up. If you want to beautify yourself, you could try to use such type.