Here’s a refined color palette suitable for a professional attorney’s wardrobe, featuring a dark brown to complement olive green, maroon, ivory, and dark navy blue.

 <Attorney Wardrobe>
1. Dark Brown - 
                            
                            #4E3B31
                         - A rich, deep brown that conveys professionalism and reliability.
2. Olive Green - 
                            
                            #4A4D23
                         - A muted, earthy green that adds a touch of sophistication and calmness.
3. Maroon - 
                            
                            #800000
                         - A deep, dark red that signifies power and confidence, perfect for a strong presence.
4. Ivory - 
                            
                            #FFFFF0
                         - A soft, warm off-white that brings lightness and elegance to the palette.
5. Dark Navy Blue - 
                            
                            #001F3F
                         - A classic, dark blue that embodies trust and authority, essential for a legal professional.

This palette combines earthy tones with classic colors to create a sophisticated and professional look that is appropriate for an attorney’s wardrobe.

Would you like suggestions on specific outfits or accessories that incorporate this palette? Or is there another aspect of wardrobe design you are interested in?