Clothes for work should not be bland just because it’s a work outfit. You should endeavor to make a statement with your dressing. Your clothing should speak for you. It should project the image of a powerful professional who is ready to make that money.
You should portray confidence even as you pitch that proposal. Your dressing should be very professional if that’s the dictate of your work environment. You can also be a little bit relaxed if your work place allows.
Remember, black and white is always a winner when you want to go the professional route.
See pictures below