Gray knee socks, Grey knee high sock, Charcoal(Dark) Gray striped socks, Silver hi socks. Gray knee socks offer a great neutral color option when you can't make up your mind. Silver gray knee high sock can go with anything and complete any outfit. Need a darker gray knee sock? Choose the charcoal grey color option. You have bright gray color and argyle pattern options to accent the gray knee hi lengh socks of your choosing as well.