change only the existing copper colored architectural elements to a rich metallic chocolate brown finish the color should be a sophisticated warm chocolate brown with a clearly visible metallic character subtle shimmering reflections and an elegant satin sheen important the finish must look like metallic chocolate brown not black graphite dark grey or flat brown paint create a refined metallic surface with realistic light reflections subtle depth and warm brown highlights the chocolate color must remain clearly visible even in shaded areas avoid orange copper tones reddish bronze excessive glossiness mirror like reflections or overly dark surfaces critical modify only the existing copper colored elements preserve their exact geometry proportions and details keep all concrete elements unchanged maintaining their original warm off white beige color and natural texture do not modify glass facade materials lighting or architecture the final result should resemble premium architectural metal cladding finished in a sophisticated metallic chocolate brown coating
