Sadly not an option! This is a weird yarn that I could never match the texture on and don't have a label for (I'm not even completely sure of the fiber - it might be an odd wool blend, it might be one of the old scratchy synthetics from before they had polyester quite figured out.) The yarn I don't have enough for a second sock is red-red-blue 3ply and the only other big enough ball is red-brown-blue. So my option are either red-brown-blue or patching together multiple colors (I think there are smaller balls of brown-brown-green and brown-green-red, but not enough for a whole second sock.)