These tips will of course help you whether you are coming to Kenya or hoping around the rest of the globe. What to Wear On airplanes we have always found that there should be a good mix between what is comfortable and what looks good. It might be the most comfortable thing in the world to wear just some old ripped t-shirt and sweat pants but also realize that you get treated the you look. The best things are the most versatile things. Again t-shirts might seem like a good choice but in actual fact they are too light and can't really be worn out in a pinch.
Collared shirts are the best.
For Africa at least we would suggest sticking to a dark greens, khakis and less bright colors. White might be the coolest color but it is the first to get dirty and when packing for a long vacation the less laundry stops the better. The one thing you should not wear is camouflage as it is only to be worn by the Kenya military. All sorts of greens are ok, just make sure they are solids. The worst place to change money is the airport banks.