The separate dark suit appears here as an independent partner reference. Jacket and trousers look dark navy to almost black. A white shirt sits beneath a narrow dark patterned tie. A pocket square and small lapel detail add to the upper area. Dark closed shoes complete the whole view. One hand is in a trouser pocket and the other arm hangs at the side. The photograph shows no couple and states no fibre or confirmed event.
If choosing together, use the reference first for the distribution of light and dark. Would you like a larger dark area with a smaller white shirt area beside your dress? Then consider necklines and an accessory that actually exists. A similar colour alone need not produce a finished shared combination.
Bring your real pieces together for that comparison or photograph them in the same lighting. Ask about separately offered accessories and the actual version. A picture with pocket square and tie is not a complete inclusion list. The partner idea can complement your personal main detail without claiming a shared wedding or common origin for the clothing shown.