A patterned tie introduces larger curved pattern before a white shirt in this complete photograph. Grey jacket, waistcoat and trousers form the outer frame; a small white square completes the chest. Dark sunglasses and black lace-up shoes are visible. The person walks with one hand in a pocket. This is a tied reference through which the task of a distinctly drawn neck area can be examined, rather than a result already showing the untied alternative.
If trying this arrangement without a tie, retain shirt and waistcoat initially. Inspect the changed upper area before choosing an opening. Perhaps the pale shirt surface appeals; perhaps the larger pattern was your preferred central point. Those wishes lead to different next trials. Both need not be replaced through one new accessory, making the actual missing contribution clearer on your worn pieces.
Add a quiet standing view with relaxed arms rather than adopting only the walking pose. Remove the jacket and assess the waistcoat with your chosen shirt state. What actually remains at the middle matters to your decision. Sunglasses, bag or watch can be introduced individually later without obscuring the neck comparison itself.