Begin by selecting your Knight's Surcoat and adding it to your cart in your primary color. The primary color of your surcoat will be on your front right side and on your back left side (relative to yourself, while the garment is being worn).
From this add-on listing, choose your secondary color. This secondary color will be on the front left and the back right of the surcoat.
Example Photo: A Knight's Surcoat ordered in white with a Color Split ordered in blue. The blue is seen on the left front and back right of the model wearing the garment.