I suggest a contrast of pillows and throw on a sofa to invite you to snuggle in for a warm winter's evening.
Start with large solid color square pillow (or 2) and then add a smaller patterned pillow (or 2) to add a real pop of contrast. Feel free to put a pair in each corner of the sofa, and then… just for fun, add a round pillow on one side to keep the mix from looking too matchy-matchy.
To complete the invitation of warmth, fold a throw, and place it underneath one of the pillow sets.