How to dye white Nike socks
Get the color of fabric dye that you need from the store, and mix it with water according to the directions provided in the package. Soak the socks in the water, and be sure to stretch them evenly to get rid of any folds or wrinkles.
Why dye em? Couldn't you just buy the things in the color you want? Or do you want to do something "groovy" like tie dye?