Gray Dress Shoes Can I Wear Brown Leather Dress Shoes With Charcoal Gray Wool Slacks?

Can i wear brown leather dress shoes with charcoal gray wool slacks? - gray dress shoes

or must wear black dress shoes? I will tomorrow a job fair and informal enterprises. I have a blue button-shirt, too. I do not know the rules, help me here. I do not believe in a pair of black dress shoes, now I have a lot of homework.