Yes, there are colored contact lenses that are specially made for people with perfect vision. People wearing them just for good looks. Or those colored contact lenses without prescription are used for some movie to achieve dramatic effects. If you want to wear it, just buy contact lenses with non prescription for looks.
The contacts, no matter colored or not should not be considered as cosmetics. The condition of human eyes is comparatively vulnerable. And not anybody can wear contacts. If you want to wear contacts even for a short term, I think it's better for you to see the qualified optometrist and he or she will tell you whether you can wear contacts or not and which is best for your eyes.