Either black or khaki is acceptable, whether it's casual pants, capris or jeans in those 2 colors is fine...As for the shirt, a royal blue shirt with the company logo...polo, L/S or S/S t-shirt, sweatshirt, or denim shirts with logo are fine, too. I generally wear GOOD tennis shoes that look a little dressier. I have a pair of chocolate brown Nike's that I love!! (LOL and if I sneak in the backdoor on the weekend, I might just show up in jeans & a nice shirt)