I just want to get colored lug nuts for my stock rims to give off a little bit more of an aftermarket look, but i've heard aftermarket lugs on stock rims is dangerous? I also heard that a certain style of aftermarket lug would be ok too. Thoughts?
not dangerous, unless you got the wrong type.
also, I suppose if you got aluminum nut, and put them off/on too many times, might wear out the threads or stretch them.
you will need lugs that match the thread pitch and diameter of the studs, also the seat needs to match the wheels (conical).
I hestitate to quote a lug size, because im not sure on the mk3.
my favourite lug nuts are the Gorilla spline drive. you can get them quite cheap on Amazon, and they are narrow, of you ever get aftermarket wheels that cant fit a bit lug wrench on.