Apropos of nothing, has anybody ever used non-prescription colored contacts?
Is it like hair dye, where you can’t wear a lighter color contact over dark eye colors? Do you have to get them custom-made? How much are they?
Are they cool? Do you know anybody who wears them? Would you think it pretentious if somebody you know started wearing them? Would you get one yellow and the other one striped with red, like a bug? 
If you google “cosmetic contact lenses” or “fashion contact lenses,” you’ll get a good sense of what’s out there and how much they cost.
I knew someone who wore mirrored contact lenses as part of her Halloween garb, and it was truly bizarre and creepy. That would lead me to think you can get light-colored lenses to change naturally dark eyes.
I don’t think the colored lenses look at all natural, but, hey, I wear fake nails sometimes and color my hair, so it’s not like I’m sayin’ unnatural is bad. But you might get some, “Is that your real eye color?” questions.
You can use colored contacts that are lighter than your eye color. They’ll produce a different effect on you than on someone with lighter eyes, but they do still change the color of your eyes.
I strongly urge you to buy them from an optometrist, so that you can be properly fitted and choose the correct material. Wearing improperly fitted contact lenses can lead to corneal staining, corneal ulcers, scarring and blindness.
Additionally, different brands are made from different materials and not everyone responds well to all the materials that they can be made from.
I should probably rephrase… you can buy them from whomever you like, but pay for a fitting from a licensed optometrist so you know which ones you should be wearing.
Yeah, I got cheap ones once in purple and was perpetually surrounded by a purple fog just on the edges of my field of vision. It tend to get annoying.
I have dark brown eyes but the lenses worked pretty well. Of course, the same shade of purple looked darker on me than it did on the model in the picture, who probably had lighter colored eyes to begin with.
It tends to get annoying, I mean.
My optometrist has developed contacts that flouresce (sp?) in the presence of UV light. I’ve seen some pics of them and they are bright! He’s ordered me a pair of red ones for halloween. My zombie costume should be a hit this year. 