I have medium brown eyes and want to get coloured contacts. What brand will work well over my eye colour?

Talk to optometrist. This question may best be answere by going to an optometrist, a person who has gone to school to develop an expertise in vision correction using refractive lenses such as contacts or glasses. The can make sure colored lenses are appropriate for your eyes and help you choose the correct brand/color for your eyes and needs.
Color contacts. Freshlook and acuvue colored contacts. Most ophthalmologist can order and fit these for you.