Blue knee socks, blue striped knee high sock. Knee high socks in your favorite color, blue! These knee hi socks are a royal blue that makes them as easy on the eyes, as they are on your feet. The athletic blue knee sock comes in the solid royal blue and has striped options. The striped blue sports knee socks offer horizontal stripes and a vertical baseball style stripe with different color options. The fashion blue knee socks have different patterns, colors, and stripe thickness variations. Have a look at them all!